A) heart
B) lungs
C) spleen
D) testes
Correct Answer: D
Solution :
Leydig cells are found in testes. They are endocrine in nature and secrete testosterone hormone responsible for secondary sexual characters of male. The heart is situated in the thoracic cavity and is enclosed in a two layered sac the pericardium. The SA node (pace-maker) initiate and contract the atria. Lungs are two pinkish coloured small inelastic, solid and spongy and covered by peritoneum, Spleen is soft, highly vascular and dark purple in colour largest lymphoid organ of body. It contains red pulp and white pulp.
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