Collagen supported cells :)
The function of the somatic nervous system includes all nerves controlling the muscular system and external sensory receptors.
The number of organsims at each levels, so there are more producer than herbivores, more herbivores than carnivores and so on...
Spermatogenesis is the process in witch spermatozoa are produced from male primordial germ cells by way of mitosis and meiosis.
Oogenesis is the process by which the female gametes, or ova, are created.