<span>A network of tubes located behind the testes. Sperm are stored here until they mature. The gland where sperm is stored until ejaculation and then releases nutrients to semen to give sperm energy. ... The tube which both urine and semen are release out of the body through.</span>
By contracting, muscles pull on bones and allow the body to move. Muscles can only contract. They cannot actively extend, though they can move or relax back into the non-contracted neutral position. Therefore, to move bones in opposite directions, pairs of muscles must work in opposition
Giving the person type a or type B or type O blood would introduce antibodies into the blood that the body wouldn't be able to control