Yes, they are constantly produced.
To regrow body parts that are lost or damaged is called spicling.
24 hrs only
yes
a starfish can regrow a part of its body subject-starfish predicate-regrow
Regeneration
No.
Spermatozoa are manufactured in the seminiferous tubules, located in the testes. Spermatozoa are the mature motile male sex cell of an animal, by which the ovum is fertilized, typically having a compact head and one or more long flagella for swimming.
REGERATION
The starfish is an amazingly diverse aquatic animal. The starfish is able to regrow an arm, and able to regrow a whole new body from a detached arm.
YES your hair can grow back after you cut it
REGERATION
Spermatozoa are the male reproductive cells responsible for fertilizing the female egg, while seminal fluid is the liquid that carries and nourishes the sperm cells during ejaculation. Seminal fluid is produced by the accessory glands in the male reproductive system, such as the prostate gland and seminal vesicles, while spermatozoa are produced in the testes.