5. Integumentary system Flashcards
Tightly packed bundles of parallel collagen fibres orientated in the same direction to withstand high tension when pulled in one direction. E.g. tendons and ligaments
Dense Regular Connective Tissue
Irregularly arranged bundles of collagen and elastic fibres. Withstands tension exerted in many directions. E.g. Dermis of skin
Dense Irregular Connective Tissue
Cells in connective tissue proper
Fibroblast, fat cells, white blood cells, mast cells, macrophages
Areolar, adipose, and reticular tissue
Loose connective tissue
dense regular, dense irregular, and elastic
Dense connective tissue
Loose arrangement of randon fibres amongst a large number of ground substance. Most widely distributed connective tissue in the body. Examples include subcutaneous layer of skin.
Areolar connective tissue
Similar to areolar connective tissue but contain a higher number of adipocytes.
Adipose tissue
Densely arraged connective tissue with an abundance of elastic fibres that allow recoil of tissue after stretching.E.g. within arteries
Elastic Connective tissue
Accessory structures in skin
Hair, nails, various glands
Arrangement of epidermis layers (from superficial to deep)
Stratum corneum, stratum lucidum (thick skin), stratum granulosum, stratum spinosum, stratum basale
Role and epidermal location of keratinocytes
Keratinocytes secrete keratin which gives the epidermis it’s protective properties. They arise from the stratum basale and are pushed upwards until they die in the stratum corneum
Role and epidermal location of melanocytes
Melanocytes release melanin, which provide darkness and protect against UV radiation. It is found in the stratum basale.
Tactile/Merkel Cells
Touch receptors found in the epidermal/dermal junction
