Tissues!!
Tissue types, forms, functions, and why they are the best!
Epithelial Tissues
Epithelial tissues are made of tightly packed cells in order to form a protective barrier. The four functions of epithelial tissue are protection, absorption, filtration and excretion, and secretion.
Simple Squamous Epithelial Tissues
Simple Squamous is one cell thick, which forms the solid layer of cells lining blood vessels and organs, and helps function with filtration and diffusion.
Simple Cuboidal Epithelial Tissues
Simple Cuboidal tissues are one cell thick and cube-shaped, which lines the digestive tract, and functions with reabsorption and secretion.
Pseudostratified Columnar
Pseudostratified Columnar is found lining the air passages of the trachea and reproductive tubes, and functions with secretion and cilia-aided movement.
Connective Tissue
Connective Tissue ranges from very loose to very rigid in order to connect, bind and support structures, protect and cushion organs and tissues, bear weight, stretch, take abuse, insulate, store fat, transport substances, and provide framework and protection.
Bones
The most rigid type of connective tissue, and used to provide framework and protection.
Tissues, Part 3 - Connective Tissues: Crash Course A&P #4
Muscular Tissue
Because of muscular tissue, we are able to move our bodies and stay alive.
Skeletal Muscle
Skeletal Muscles are found in large body muscles, and are comprised of muscle bundles which attach to bones for movement.
Smooth Muscle
Smooth Muscles line organ walls and blood vessel walls, and are involuntary in order to move blood, food and waste through our bodies.
Cardiac Muscle
Cardiac Muscles line the heart walls, and is involuntary in order to make synchronous contractions of a heart beat.
Nervous Tissue
Nervous tissue is found in the brain, spinal cord, and nerves, and because of its long myelin sheath and dendrites, it generates and transmits nerve impulses to and from body organs via neurons.
Blood: Good for you, Great as a Connective Tissue!
Blood is composed of red blood cells, white blood cells, and platelets. Red blood cells distribute oxygen throughout the body, and its small rounded shape helps for easy movement all throughout the body. White blood cells mount immune responses, and they are covered in pathogenic grabbing material in order to eat away at bad stuff while alerting the body that there is something wrong. Platelets are involved in blood clotting, are small in order for them to stick on to red blood cells. Blood is classified as a connective tissue because it moves around nutrients and oxygen through the body. It is perfect for us because without it, we would die from lack of oxygen and nutrients.