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what is coelom - body cavity explainamong the bilaterally symmetrical organisms animals have three different types of body plans with respect to body
what is bilateral symmetry systemto review all animals besides the sponges phylum porifera belong to the eumetazoa there are two groups within the
explain phylum cnidaria - coelenteratesmembers of the phylum cnidaria and one other group-phylum ctenophora the comb jellies-are the only two animal
explain radial symmetry in classification of the animal kingdomall of the animals besides the sponges are considered to belong to the eumetazoa or
what is phylum porifera in classification of the animal kingsponges are the simplest form of animals their bodies are not organized in any specific
what is lactationhigh levels of estrogens and progesterone during pregnancy stimulate the breasts to develop prior to lactation or milk production at
explain the birth in human biologyin humans birth of the infant occurs about 270 days after conceptionthe period during which the uterus contracts to
explain fetal developmentthe medical profession divides pregnancy into three-month stages called trimesters at the end of the first trimester the
what is embryogenesis explain in detailembryogenesis in humans consists of the first eight weeks of development of the zygote embryogenesis in
explain human developmenthuman development begins with fertilization and continues throughout life fertilization occurs when two sex cells a sperm
breifly describe the menstrual cycleeach month during a females reproductive years the hypothalamus secretes a hormone that stimulates the anterior
explain the female reproductive systemthe female reproductive system consists of the primary sex organs the ovaries and the accessory organs
what is oogenesis the female sex cells or eggs are formed in the ovaries the primary sex organs of the female the precursor of the egg cells or
describe the male reproductive systemin addition to the primary sex organs the testes there are accessory structures that store nourish and activate
what is spermatogenesis in human biologythe male sex cells or sperm are produced in the oval-shaped testes the primary sex organs of the male
explain the reproductive systemthe human reproductive system produces not only reproductive organs and gametes but also sex hormones which have
write short notes on urinethe concentrated filtrate produced by the kidney is called urine and is composed mainly of water urea toxins and mineral
explain the kidney function in human biologyblood first enters the capillaries in bowmans capsule where it is filtered the pores in the capillary
explain the urinary system in human bodythe urinary system removes the waste materials produced as a result of all the metabolic process required to
what is large intestine in human biologyfood undigested in the small intestine is passed on by peristalsis into the large intestine or colon the
explain the small intestinethe small intestine is made up of three sections the duodenum the jejunum and the ileum bile from the liver and pancreatic
explain the liver organthe liver is the largest internal organ in the human body it lies just below the diaphragm in the upper right area of the
what is pancreas the pancreas lies in the abdominal cavity in a loop between the stomach and small intestine the pancreas consists of two major types
what is the role of stomach in human bodythe stomach serves both to digest food and to hold it so that it can be gradually released into the small
what is working of mouth in human bodyfood enters the digestive system through the mouth where it is processed by the teeth and mixed with saliva