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FEATURE. MALE. FEMALE. ovaries. testicles. endocrine gland. testosterone. estrogen/progesterone. hormones. small. large. relative size of cells. constant/throughout life. once a month/ up age 50. reproductive timing. millions/lots. 500/ low number. relative number of cells.
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FEATURE MALE FEMALE ovaries testicles endocrine gland testosterone estrogen/progesterone hormones small large relative size of cells constant/throughout life once a month/ up age 50 reproductive timing millions/lots 500/ low number relative number of cells smell, hair, penis enlargement, shoulders, etc., growth menstruation, growth, breast development, hips, etc. changes at puberty