The clot grows. Proteins in your blood called clotting factors signal each other to cause a rapid chain reaction. It ends with a dissolved substance in your blood turning into long strands of fibrin. These get tangled up with the platelets in the plug to create a net that traps even more platelets and cells.
The Male Reproductive System The main role of the male reproductive system is to make and deliver sperm. The testes are the main organs of the male system. Two testes are held in an external sac called the scrotum. The testes make sperm in tiny tubes called seminiferous tubules.The sperm mature and are stored in an epididymis. A tube called a vas deferens carries sperm from each testis to the urethra within the penis.Along the way, secretions of several glands form a nutrient-rich fluid called seminal fluid.he sperm mature and are stored in an epididymis. A tube called a vas deferens carries sperm from each testis to the urethra within the penis. Along the way, secretions of several glands form a nutrient-rich fluid called seminal fluid.
The term vulva means the external sex organs of a woman. The vulva is made up of two pairs of lips. The outer pair of lips is called the labia majora and the inner pair of lips is called the labia minora.Between these lips are two openings. One is the entrance to the vagina. The other is the urethra, which is the outlet for urine.At the front of the vulva is the clitoris, which helps a woman reach a sexual climax. The opening to the back passage, the anus, is also close to the vulva, but is separate from it. The sheet of skin between the vagina and the anus is called the perineum.he term vulva means the external sex organs of a woman. The vulva is made up of two pairs of lips. The outer pair of lips is called the labia majora and the inner pair of lips is called the labia minora.