Classification Of Animal Tissues — a labelled NEET Biology diagram with a definitions lexicon.
Classification of Animal Tissues Labelled parts: Skeletal Muscle, Smooth Muscle, Cardiac Muscle, Unbranched, Striated, Multinucleated, Spindle-shaped, Non-striated, Uninucleate, Branched, Intercalated discs, Areolar Tissue, Adipose Tissue, Bone, Hyaline Cartilage, Plasma, Erythrocytes, Leukocytes, Platelets, Haversian system, Lamellae, Lacunae, Central canal, Chondrocytes, Matrix. A loose connective tissue found beneath the skin and surrounding internal organs, composed of collagen, elastin, and various cells. FYI: It acts as a supportive packing material, holding organs in place and allowing for the passage of blood vessels and nerves. A specialized type of loose connective tissue primarily composed of adipocytes, which store excess energy in the form of triglycerides. FYI: Adipose tissue serves multiple roles, including insulation, cushioning, and acting as an endocrine organ (releasing hormones like leptin). The most common type of cartilage, characterized by a smooth, glassy matrix that provides flexible support to bones and joints. FYI: It is found in the nose, trachea, and costal cartilages, and is often replaced by bone during development (endochondral ossification). The structural unit of compact bone, consisting of concentric rings (lamellae) surrounding a central canal. FYI: The Haversian system allows for nutrient and waste exchange between the blood vessels in the periosteum and the bone matrix. Concentric rings of mineralized matrix (primarily calcium phosphate) that make up the structure of compact bone around the central canal. FYI: The arrangement of lamellae provides immense strength and resistance to bending forces in the bone. Small, kidney-shaped spaces or cavities found between the osteocytes (bone cells) within the matrix of bone tissue. FYI: Osteocytes reside within the lacunae and maintain the bone matrix, communicating with each other via canaliculi. A longitudinal channel running through the center of the osteon (Haversian system), containing blood vessels and nerves. FYI: This canal is vital for supplying oxygen and nutrients to the bone tissue and removing metabolic waste products. These are specialized blood cells responsible for transporting oxygen from the lungs to the body tissues. They contain hemoglobin, which binds reversibly with oxygen, allowing for efficient gas exchange. FYI: Mature mammalian erythrocytes are anucleated (lack a nucleus) and biconcave in shape, maximizing surface area for gas exchange. These are white blood cells that are crucial components of the immune system. They defend the body against pathogens through phagocytosis, antibody production, and direct killing. FYI: Neutrophils are the most abundant type of leukocyte and are typically the first responders to bacterial infections. Also known as thrombocytes, these are small, anucleated cell fragments derived from megakaryocytes. Their primary function is to initiate blood clotting (hemostasis) at sites of injury. FYI: Platelets aggregate at the injury site and release factors that activate the coagulation cascade, leading to the formation of a fibrin mesh. These are the mature cells found within cartilage tissue. They are responsible for maintaining the cartilage matrix, which provides structural support to joints and nose. FYI: Unlike osteocytes, chondrocytes are trapped within lacunae in the cartilage matrix and are responsible for the slow process of cartilage repair.