Study of zoology

  PITUITARY GLAND Glands are involved in the production and secretion of hormones. Pituitary gland is called as Hypophysis. It is the smallest gland among all the other glands, but it controls the all others glands. So, the pituitary gland is called as Master endocrinic gland. This pituitary gland produces 9   hormones. POSITION:- It is located in sella turica, a depression in sphenoid bone and is attached to hypothalamus by a stalk. Anatomically it is divides as; Adenohypophysis (Anterior Pituitary) 7 hormones Neurohypophysis (Posterior Pituitary) 2 hormones 1. ADENOHYPOPHYSIS:- It is also called as Anterior Pituitary. It develops as an outgrowth of ectoderm called "Rakthe's poch", in the roof of buccal cavity. This anterior pituitary have 2 portions; Pars distalis Pars intermedia ADENOHYPOPHYSIS PARS DISTALIS:- In human, this pars distalis region of pituitary is commonly called as the anterior pituitary. This produce 6 types of hormones; they are:-  Human growth...

  DIGESTIVE DISORDERS What are digestive disorders Inflammation of intestinal tract is the most common aliment due to bacterial or viral infections. The infections are also caused by parasites of intestine such as; Tape worm, Round worm, Thread worm, Hook worm, Pin worm and etc; Some digestive disorders are; JAUNDICE VOMITING DIARRHOEA CONSTIPATION INDIGESTION What are digestive disorders 1. JAUNDICE:- The liver is affected (hepatitis). Anorexia (the lack of appetite) is a common symptom. Skin and white part of eye balls turn yellow due to deposition of the bile pigments.  JAUNDICE 2. VOMITING:- It is throwing out of contents of stomach through mouth. This reflex action is controlled by vomiting center in medulla oblongata. A feeling of nausea precedes vomiting. FOOD POISONING OR VOMITING 3. DIARRHOEA:- The abnormal frequency of bowl movements and increased liqidity of faecal discharge is known as diarrhoea. It reduces absorption of food and results in loss of water( dehydra...

HUMAN RESPIRATORY SYSTEM what are the main parts in respiratory system The major   respiratory organ in human are LUNGS. It is not applied to all the organisms, other animals have different organs for respiration. Some major types of respiratory organs of some animals:- Earth worm - Moist cuticle Most aquatic Arthropods like prawn - Gills Limulus - Book gills Scorpion - Book lungs Insects - Trachea Aquatic molluscs -Ctenidia (gills) Terrestrial moluscs - Pulmonary sacs (gills) Echinoderms - Dermal branchiae,  Tube feet, Respiratory trees etc; Hemichordates - Gills Fishes - Gills Amphibian larvae - Skin, Bucco-pharyngeal lining, Lungs Adult frogs - Lungs Now lets talk about human respiratory system; what are the main parts in respiratory system Human respiratory system consists of major respiratory organ as lungs, but it has a pathway. Our pathway starts from nostrils. Human respiratory system includes 2 tracts. UPPER RESPIRATORY TRACT- Nose, Pharynx, Larynx. LOWER RESPIRATORY ...