Neurohypophysis

Hypophysis or the pituitary gland of human is small pea-shaped gland weighing about 0.5 gm which makes up 80 percent of the gland’s overall weight. It is located under the brain, just behind the bridge of the nose between the hypothalamus and the pineal gland.Hypophysis or the pituitary gland consists of the following two parts: Adenohypophysis … Read more

Neuron: Definition, Classification, Structure and Functions

Nerves and specialized cells (neurons) comprise the nervous system. Structurally, the nervous system includes two parts such as CNS (the central nervous system) and the peripheral nervous system. The nervous system is highly specialized epithelium tissue for reception, discharge, and transmission of stimuli. The neuron or nerve cell is the structural and functional unit of … Read more

Kidney: Structure and Functions

The body needs some essential foods for maintaining proper growth. These foods should be some protein like meat, fish, eggs, milk, pulse, etc which are hydrolyzed into amino acids during digestion. Some amounts of amino acid are utilized in metabolic process of energy production. During the metabolic process, some nitrogenous wastes are produced as byproducts … Read more

Hemorrhage: Causes and Effects

Hemorrhage is the escape of blood from a blood vessel or the heart. In rupture of the wall of a vessel, hemostatic mechanisms start to control the hemorrhage. A small hemorrhage may have no bad effect but an acute massive hemorrhage threatens the life.Chronic blood loss produces an iron-deficiency anemia. Hemorrhage may be local or … Read more

Blood Coagulation

Blood is a fluid connective tissue which is an essential component in the human body. If the body losses this fluid, it may cause life threatening. Through the clotting mechanism, the body defends against loss of blood. In this case, different coagulation factors, vascular mechanisms, thrombocytes, enzymes, prostaglandins and proteins play important role to clot … Read more

Structure of the Heart

The heart in all animals is a muscular organ. In human, it is placed in the position of the thoracic cavity just behind the sternum and is slightly tilted to the left. Thus, the heart-beat is felt on the left side. It pumps blood throughout the blood vessels to various parts of the body by … Read more

Sinusitis : Causes, Symptoms and Treatments

The sinus infection is known as sinusitis. It is a major health problem which can cause inflammation of the sinus tissues. The people that have weak immune systems are at greater risk to sinusitis.Slimy substances are  produced from sinuses, called mucous that help to keep the nasal passage moist. It also helps to trap different … Read more

Spermatogenesis Vs Oogenesis

Gametes are produced by the animals through meiosis cell division from diploid mother cells (gonads). There are two types of gonads such as testis in males and ovaries in females. The process of gamete production (ovum and sperm) is known as gemetogenesis (Gr. Gamos=marriage; genesis=origin).Testes produce male gametes or sperms through the process of spermatogenesis … Read more