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Epithelial Tissue (ET)

A tissue type that covers body surfaces, lines cavities and organs, and forms glands.

Simple Squamous ET

A single layer of flat cells found in locations such as lung alveoli and Bowman’s capsule.

Diffusion

The primary function of simple squamous epithelium, allowing gases to pass through.

Filtration

The primary function of simple squamous ET in Bowman’s capsule.

Endothelium

A type of simple squamous ET that lines blood vessels and provides a smooth surface.

Mesothelium

A layer of simple squamous ET that covers organs.

Simple Cuboidal ET

A single layer of cube-shaped cells found in kidney tubules and ducts of glands.

Reabsorption

The process by which simple cuboidal ET in kidney tubules selectively reabsorbs substances.

Secretion

The primary function of simple cuboidal ET in glands like salivary and pancreatic ducts.

Simple Columnar ET

A single layer of tall, column-shaped cells found in the digestive tract.

Absorption

The primary function of simple columnar ET in the nutrient-absorbing villi of the small intestine.

Goblet cells

Cells found in simple columnar ET that secrete mucin to form mucus.

Keratinized Stratified Squamous ET

A type of tissue providing strength and waterproofing, found in the epidermis.

Non-keratinized Stratified Squamous ET

Provides protection against abrasion in moist areas like the oral and nasal cavities.

Stratified Cuboidal ET

Found in the ducts of sweat and mammary glands, providing structural support.

Stratified Columnar ET

Found in parts of the epiglottis and pharynx, providing protection.

Simple Ciliated Columnar ET

Lines the uterine tubes and helps transport materials through the lumen.

Pseudostratified Ciliated Columnar ET

Lines the trachea and bronchi, removing foreign materials and bacteria.

Transitional ET

Lines the ureters and urinary bladder, allowing for distension.

Glandular ET

Epithelial tissue specialized for hormone and enzyme secretion.

Loose (Areolar) CT

Connective tissue that binds skin to muscles and surrounds blood vessels.

Dense Irregular CT

Found in the reticular region of dermis, providing structural support.

Dense Regular CT

Tissue type found in tendons and ligaments, providing strong support.

Elastic CT

Found in large arteries and lower respiratory tract, providing elasticity.

Reticular CT

Provides structural support in organs like liver and spleen.

Adipose CT

Connective tissue storing fat, providing padding and energy.

Bone CT

Connective tissue providing structural support and housing for blood cells.

Hyaline Cartilage CT

Provides support and flexibility in structures like the trachea and fetal skeleton.

Elastic Cartilage CT

Found in the external ear and epiglottis, allowing for flexibility.

Fibrocartilage CT

Supports and absorbs compression in knee menisci and intervertebral joints.

Blood CT

Connective tissue that transports oxygen, nutrients, and waste.

Fibroblast

Cell type in connective tissue that produces collagen and elastic fibers.

Reticulocyte

Cells that produce reticular fibers for connective tissue structure.

Chondrocyte

A cell responsible for maintaining cartilage.

Osteocyte

A mature bone cell maintaining bone tissue.

Adipocyte

A fat cell that stores energy.

Mast Cell

Involved in immune responses by producing heparin and histamine.

Monocyte

A type of white blood cell that is phagocytic.

Macrophage

A monocyte that has migrated to tissue; involved in immune defense.

Plasma Cell

A cell that produces antibodies for immune function.

Erythrocyte

A red blood cell that transports oxygen and carbon dioxide.

Leukocyte

A white blood cell that is part of the immune response.

Platelet

A cell fragment involved in blood clotting.

Collagen

A protein that provides strength and structure to connective tissues.

Elastic Fibers

Fibers in connective tissue that provide elasticity and flexibility.

Reticular fibers

Fibers that provide a structural framework for many organs.

Functions of Epithelial Tissue

Protection, absorption, secretion, and sensation.

Functions of Connective Tissue

Support, bind other tissues, protection, insulation, and transportation of substances.

Functions of Muscle Tissue

Movement of the body, contraction and generation of force.

Functions of Nervous Tissue

Transmission of electrical signals for communication and control within the body.

Function of Stratified Squamous ET

Protection against abrasion and pathogens.

Function of Simple Columnar ET

Absorption of nutrients and secretion of digestive enzymes.

Function of Loose (Areolar) CT

Provides flexibility and support, holding organs in place.

Function of Adipose CT

Energy storage, insulation, and cushioning of organs.

Function of Hyaline Cartilage CT

Provides support while allowing for flexibility in structures.

Function of Blood CT

Transportation of respiratory gases, nutrients, and waste products.

Epithelial Tissue Locations

Epithelial tissue is found covering body surfaces, lining cavities, and forming glands.

Simple Squamous ET Locations

Found in lung alveoli, Bowman’s capsule, and lining blood vessels as endothelium.

Simple Cuboidal ET Locations

Located in kidney tubules and ducts of glands, such as salivary and thyroid glands.

Simple Columnar ET Locations

Found in the lining of the digestive tract, such as the stomach and intestines.

Keratinized Stratified Squamous ET Locations

Located in the epidermis of the skin, providing protective barrier.

Non-keratinized Stratified Squamous ET Locations

Found in moist areas like the oral cavity, esophagus, and vagina.

Transitional ET Locations

Lines the ureters and urinary bladder, allowing stretching as they fill.

Loose (Areolar) CT Locations

Found beneath epithelial tissues, surrounding blood vessels, and organs.

Dense Irregular CT Locations

Located in the dermis of the skin, providing strength in multiple directions.

Dense Regular CT Locations

Found in tendons and ligaments, providing strong support in one direction.

Adipose CT Locations

Found in subcutaneous fat, around organs, and within bone marrow.

Hyaline Cartilage CT Locations

Found in the trachea, larynx, and at the ends of long bones.

Elastic Cartilage CT Locations

Located in the external ear and epiglottis, allowing flexibility.

Fibrocartilage CT Locations

Found in intervertebral discs, knee menisci, and pubic symphysis.

Blood CT Locations

The blood circulates within the cardiovascular system throughout the body.