Bones that function primarily to protect viscera are skull bones, rib cage, shoulder girdle and pelvic girdle.
The diaphragm is a type of birth control. It is a shallow, bendable cup that is put inside the vagina. A diaphragm prevents pregnancy acting as a barrier for sperm to entry the cervix and joining an releases egg. Sometimes, diaphragm is used together with cream or gel that kills sperm.
Spermatozoa is the form of sperm that is fully matured
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