in subcutaneous tissue, surrounding the kidneys, eyeball, heart, etc. Adipose tissue is called ‘ white fat’ or white adipose tissue. The adipose tissue which contains abundant mitochondria is called ‘ Brown fat ’ or Brown adipose tissue. White fat stores nutrients whereas brown fat is used to heat the blood stream to warm the body.
Brown fat produces heat by non- shivering thermogenesis in neonates. Reticular Connective Tissue resembles areolar connective tissue, but, the matrix is filled with fibroblasts called reticular cells. It forms an internal framework ( stroma ) that supports the blood cells (largely lymphocytes) in the lymph nodes, spleen and bone marrow. Dense Connective Tissues (Connective Tissue Proper) Fibres and fibroblasts are compactly packed in the dense connective tissues.
Orientation of fibres show a regular or Figure . Loose connective tissues Areolar tissue Adipose tissue )DWVWRUDJH DUHD 1XFOHXV 3ODVPD PHPEUDQH 0DFUR SKDJH )LEUREODVW &ROODJHQ ILEHUV 0DVWFHOO XI Std Biology-Zoology Chapter- irregular pattern and is called dense regular and dense irregular tissues. Dense regular connective tissues primarily contain collagen fibres in rows between many parallel bundles of tissues and a few elastic fibres. The major cell type is fibroblast.
It attaches muscles and bones and withstands great tensile stress when pulling force is applied in one direction. This connective tissue is present in tendons, that attach skeletal muscles to bones and ligaments attach one bone to another. Dense irregular connective tissues have bundles of thick collagen fibres and fibroblasts which are arranged irregularly. The major cell type is the fibroblast .
It is able to withstand tension exerted in many directions and provides structural strength. Some elastic fibres are also present. It is found in the skin as the leathery dermis and forms fibrous capsules of organs such as kidneys, bones, cartilages, muscles, nerves and joints. Elastic Connective Tissue contains high proportion of elastic fibres.
It allows recoil of tissues following stretching. It maintains the pulsatile flow of blood through the arteries and the passive recoil of lungs following inspiration. It is found in the walls of large arteries; ligaments associated with vertebral