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Tissues including membranes and glands: types

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Definition A tissue is a group of cells the Usally have a common original in an embryo and function  together to carry out specialized activities. Types of tissues The tissues of the consist of large numbers of cells and they are  classified according to the size, shape and functions of these cells. There are four main types of tissue that each have subdivisions . They are: ¹. Epithelial tissue ². Connective tissue ³. Muscular tissue 4. Nervous tissue 1. Epithelial Tissue It covers body surface and lines hollow organs. Body cavities and ducts. It is allows the body interact with internal and y environment. Epithelial tissue consists of cells arranged in continuous sheets in single or multiple layers. Structure of Epithelial Tissue: Apical surface of an Epithelial cell faces the body surface, body cavity, lumen  of an internal organ recieves cell  secretion. The lateral surfaces of an Epithelial cell facing the adjacent cells on either side may contain...
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Body cavities (शारीरिक गड्डे)

BODY CAVITIES A body cavities is fluid-filled space in multicellular organism other than those of vessels ( such as blood vessels and lymph vessels) .the term usually refers to the space located between an outer covering (epidermis),and the outer lining of the gut cavity internal organs develop. The cavities include: 1. Dorsal body cavity: a.   Cranial cavity:  Enclosed by the skull and contains the brain. b. Spinal canal: Enclosed by the spine and contains the spinal cord. 2. Ventral body cavity:  a. Thoracic cavity: Enclosed by the ribcage and contains the lungs and heat. b. Abdominopelvic cavity: 1. Abdominal cavity: Enclosed by the ribcage and pelvis and contains the kidneys, ureters, stomach, intestines, liver, gallbladder, and pancreas. 2. Pelvis cavity: Enclosed by the pelvis and contains bladder ,anus and reproductive system. Translate: Hindi शारीरिक गड्डे  एक शरीर की गुहाएं वाहिकाओं (जैसे रक्त वाहिकाओं और लिम्फ वाहिकाओं) के अलावा बहुकोशिकीय जीव में द्रव से भ...
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COMPOSITION AND FORMATION OF BLOOD

COMPOSITION AND FORMATION OF BLOOD Introduction Blood is a fluid connective tissue which circulates continuously around the body allowing constant communication between tissues distant from each other. It is pumped by the heart that circulates throughout the body vio., The  arteries, veins and capillaries. The blood carries oxygen and nutrients to the body tissues and removes carbon dioxide and other wastes. All types of blood cells are derived from the bone marrow. Composition of Blood Total blood volume: 5-6 littles (8% of body weight or 80 ml/kg body weight) Specific gravity:1050-1060 Viscosity: 4-5 times that of water pH: 7.4±0.05; alkaline Formation of blood cells * The process of blood cells formation is called Haemopoiesis . * Blood cells are synthesized mainly in Red Bone Marrow . * Red bone marrow is a highly vascularized connective tissue located in the microscopic spaces between trabecular of spongy bone tissue. It chiefly present, in bones of the axial skeleton, pectora...
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