Azoospermia is the medical condition of a man whose semen contains no sperm. It is associated with infertility, but many forms are amenable to medical treatment. In humans, azoospermia affects about 1% of the male population and may be seen in up to 20% of male infertility situations. 1 Classification 1.1 Pretesticular.
Nematocysts are the stinging cells on tentacles of a cnidarian, like a jellyfish. Since jellyfish don't have any teeth, and their body consists of gelatin, it's hard to captur â¦ e prey.Nematocysts help jellyfish with feeding by stinging the prey in an attempt at trying to immobilizing the prey.hat is a Cnidarian? cnidarians, such as jelly fish, sea anemones, hydra, and corals, have tentacles surrounding their mouth. they are a hollow-bodied animal with two celled layers that are organ â¦ ized into tissues. the inner layer forms a digestive cavity where food is broken down.
Cnidocyte and nematocyst are two structures that aid in the capturing of the prey by cnidarians. Cnidocyte is an epidermal cell that contains the nematocyst. Cnidoctes can be found in the tentacles of the cnidarians. The nematocyst is the organelle inside the cnidocyte used to inject toxins into the prey. The main difference between cnidocyte and nematocyst is the role of each structure in the capturing of the prey by cnidarians.