Examlex
The agglutinogens (or antigens) that determine the ABO and Rh blood types are
Testosterone
A hormone primarily produced in the testes in males and the ovaries in females, crucial for the development of male growth and masculine characteristics.
Sex Hormone
Biological compounds that play critical roles in sexual function and characteristics, including hormones like estrogen, progesterone, and testosterone.
Menarche
The first occurrence of menstruation in a female, marking the onset of fertility.
Primary Sex Characteristic
refers to the biological attributes directly involved in reproduction, including the sex organs such as ovaries in females and testes in males.
Q4: In sum,there are _ pairs of spinal
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