Humans

• Sensory receptors are specialized cells that detect changes in the external or internal environment and send signals to the brain via nerves.
• Neurons are specialized cells that transmit information throughout the body.
• The nervous system controls all bodily functions through electrical impulses sent by neurons.
• steps of birth before becoming a baby
• the first step is fertilization, where an egg cell from the mother's ovary combines with a sperm cell from the father's testes
• as the embryo develops, it goes through several stages including gastrulation, organogenesis, and fetal development
• after fertilization, the zygote divides into two identical cells called blastomeres
• Is it testes or testis
• Effector


  A muscle or gland that carries out the response to the stimulus