{"id":3923,"date":"2023-01-09T10:37:59","date_gmt":"2023-01-09T10:37:59","guid":{"rendered":"https:\/\/8thclass.deltapublications.in\/?page_id=3923"},"modified":"2025-09-22T06:52:25","modified_gmt":"2025-09-22T06:52:25","slug":"s-10-c-secondary-sexual-characters","status":"publish","type":"page","link":"https:\/\/8thclass.deltapublications.in\/index.php\/s-10-c-secondary-sexual-characters\/","title":{"rendered":"s-10.c Secondary Sexual Characters"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d\"><strong>Secondary Sexual Characters<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div style=\"position: relative; width: 100%; height: 0; padding-top: 56.2500%;\n padding-bottom: 0; box-shadow: 0 2px 8px 0 rgba(63,69,81,0.16); margin-top: 1.6em; margin-bottom: 0.9em; overflow: hidden;\n border-radius: 8px; will-change: transform;\">\n  <iframe loading=\"lazy\" style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0; border: none; padding: 0;margin: 0;\"\n    src=\"https:\/\/www.canva.com\/design\/DAF5Td-qinI\/KioDMtP_pGIqqCkS64rWnQ\/watch?embed\" allowfullscreen=\"allowfullscreen\" allow=\"fullscreen\">\n  <\/iframe>\n<\/div>\n<a href=\"https:&#x2F;&#x2F;www.canva.com&#x2F;design&#x2F;DAF5Td-qinI&#x2F;KioDMtP_pGIqqCkS64rWnQ&#x2F;watch?utm_content=DAF5Td-qinI&amp;utm_campaign=designshare&amp;utm_medium=embeds&amp;utm_source=link\" target=\"_blank\" rel=\"noopener\">secondary sexual characters<\/a> by Delta publications\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-color has-link-color has-huge-font-size wp-elements-c94a149b099fb3f23f355c7448aa9d47\" style=\"color:#74008b\"><strong>key notes:<\/strong><\/p>\n\n\n<div class=\"wp-block-image is-resized\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"402\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/shutterstock725977087w400.png\" alt=\"\" class=\"wp-image-12145\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/shutterstock725977087w400.png 400w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/shutterstock725977087w400-150x150.png 150w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-33c744c6ace4f309a564ea1a6303613f\" style=\"color:#000060\">1. <strong>Definition of Secondary Sexual Characters<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Secondary sexual characteristics<\/strong> refer to the physical traits that differentiate males and females of a species, but are not directly involved in reproduction.<\/li>\n\n\n\n<li>These traits emerge during puberty as a result of hormonal changes.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-c3e5a2f40e22f2a24ce4c4d1163caf24\" style=\"color:#000060\">2. <strong>Characteristics in Males and Females<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>In Males:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Deep voice:<\/strong> Due to the enlargement of the larynx (voice box).<\/li>\n\n\n\n<li><strong>Facial hair:<\/strong> Growth of beard and mustache.<\/li>\n\n\n\n<li><strong>Muscle development:<\/strong> Increase in muscle mass and strength.<\/li>\n\n\n\n<li><strong>Broad shoulders:<\/strong> Increased bone density and broadening of the shoulder region.<\/li>\n\n\n\n<li><strong>Body hair:<\/strong> Hair growth on chest, arms, and legs.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>In Females:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Breast development:<\/strong> Growth of breasts due to the increased secretion of estrogen.<\/li>\n\n\n\n<li><strong>Wider hips:<\/strong> Pelvic bones widen for childbirth.<\/li>\n\n\n\n<li><strong>Increased fat distribution:<\/strong> More fat is stored in the hips, thighs, and breasts.<\/li>\n\n\n\n<li><strong>Menstruation:<\/strong> Start of menstrual cycle as a sign of fertility.<\/li>\n\n\n\n<li><strong>Softer skin and hair:<\/strong> Changes due to hormonal influence.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-b682b38648d9d5be162fcbbc3fa8093a\" style=\"color:#000060\">3. <strong>Hormonal Regulation<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Estrogen:<\/strong> Responsible for the development of female secondary sexual characteristics.<\/li>\n\n\n\n<li><strong>Testosterone:<\/strong> Responsible for the development of male secondary sexual characteristics.<\/li>\n\n\n\n<li>These hormones are secreted by the gonads (ovaries in females and testes in males) and cause physical changes during puberty.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-1f14ff2038dedcf844281fd6c0eeb23e\" style=\"color:#000060\">4. <strong>Purpose of Secondary Sexual Characters<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>These characteristics are typically associated with attracting mates and ensuring reproductive success.<\/li>\n\n\n\n<li>They signal to others that an individual is mature and capable of reproduction.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-fbbb124467f270b870a4923cae9b9f37\" style=\"color:#000060\">5. <strong>Difference from Primary Sexual Characters<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Primary sexual characters<\/strong> are directly involved in reproduction (e.g., ovaries and testes).<\/li>\n\n\n\n<li><strong>Secondary sexual characters<\/strong> are physical traits that arise due to hormonal changes and distinguish males from females but do not directly play a role in reproduction.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-42df1150a177647e38b6a33b19941373\" style=\"color:#000060\">6. <strong>Variation Across Species<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>In humans, these traits appear during puberty, typically between the ages of 10 and 15, but the exact age varies based on genetics and environmental factors.<\/li>\n\n\n\n<li>Secondary sexual characteristics vary widely across species. For example, the peacock\u2019s colorful feathers are a secondary sexual characteristic used to attract mates.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/81815\/417\/687\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-94.png\" alt=\"\" class=\"wp-image-7786\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-94.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-94-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-94-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/81648\/263\/672\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-94.png\" alt=\"\" class=\"wp-image-7790\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-94.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-94-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-94-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Secondary Sexual Characters secondary sexual characters by Delta publications key notes: 1. Definition of Secondary Sexual Characters 2. Characteristics in Males and Females 3. Hormonal Regulation 4. Purpose of Secondary Sexual Characters 5. Difference from Primary Sexual Characters 6. Variation Across Species Let&#8217;s practice!<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-3923","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_hostinger_reach_plugin_has_subscription_block":false,"_hostinger_reach_plugin_is_elementor":false,"_links":{"self":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3923","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3923"}],"version-history":[{"count":18,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3923\/revisions"}],"predecessor-version":[{"id":21547,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3923\/revisions\/21547"}],"wp:attachment":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3923"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}