Why rate of heart beat is more in animals with less weight ?
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As ᴛʜᴇ sɪᴢᴇ ᴏғ ᴀɴ ᴀɴɪᴍᴀʟ ɪɴᴄʀᴇᴀsᴇs, ᴛʜᴇ ɴᴜᴍʙᴇʀ ᴏғ ᴄᴇʟʟs ɪɴ ɪᴛ ᴀʟsᴏ ɪɴᴄʀᴇᴀsᴇs. ... ᴛʜᴇʀᴇ ᴀʀᴇ ᴍᴀɴʏ ᴏʀɢᴀɴs ᴀɴᴅ ʙʟᴏᴏᴅ ᴠᴇssᴇʟs ᴀɴᴅ ᴛʜᴇʀᴇ ɪs ᴀ ʟᴏᴛ ᴏғ ᴡᴏʀᴋ ᴛᴏ ᴅᴏ ɪɴ ᴀ ʙɪɢ ᴀɴɪᴍᴀʟ.SO, THE ᴄᴇʟʟs sʟᴏᴡ ᴅᴏᴡɴ ᴀɴᴅ ᴅᴏ ᴍᴏʀᴇ ᴡᴏʀᴋ ᴄᴏᴍᴘᴀʀᴇᴅ ᴛᴏ ᴀ ᴛɪɴʏ ᴀɴɪᴍᴀʟ. ᴛʜᴜs, ᴛʜᴇ ʜᴇᴀʀᴛ ʙᴇᴀᴛs sʟᴏᴡᴇʀ ɪɴ ʟᴀʀɢᴇ ᴀɴɪᴍᴀʟs.
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The time taken for circulation of blood from heart to body parts and body parts to heart is less
So therefore, the rate of heart beat is more in animals with less weight
Hope it helps
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