Testicular? [ gāo wán ]？ A part of the reproductive organs of human or male animals, also known as yin pill, testis or external kidney.
Testicles are located in the scrotum, one on the left and one on the right. Generally the left side is slightly lower than the right side 1cm. Testicles are slightly oblate and oval with smooth surface, which are divided into medial and lateral sides, anterior and posterior edges and upper and lower ends. Its frontier is free; There are blood vessels, nerves and lymphatic vessels in and out of the posterior margin, which are in contact with epididymis and testis of vas deferens. The upper end and trailing edge are attached to the epididymal head, and the lower end is free. The outside is convex and the inside is flat. Testicles grow rapidly with sexual maturity, and shrink and become smaller with the decline of sexual function in old age.
Make the following sentences:
Objective: To study the acrosin activity of human testicular sperm and epididymal sperm.
(2) After all, he is a man who cheated death and survived testicular cancer.
(3) Results: Among 54 patients, meiosis was arrested in pachytene in 45 cases, univalent in 6 cases, polyvalent in 2 cases, and normal meiosis 1 case.
(4) Vasectomy: After the vas deferens is cut off, it is disconnected from the testis.
(5) Objective: To clone and express mouse testis annexin A 1 and study its localization in testis.