What is the function of the simple squamous epithelium?
Simple squamous epithelial cells in the kidney enable rapid filtration of the blood and diffusion of small molecules. This process allows the kidneys to remove waste products and excess water from the body in the urine.
Table of epithelia of human organs
|digestive||oesophagus||Stratified squamous, non-keratinized|
|digestive||stomach||Simple columnar, non-ciliated|
|digestive||small intestine||Simple columnar, non-ciliated|
|digestive||large intestine||Simple columnar, non-ciliated|
- This type of epithelium is often permeable and occurs where small molecules need to pass quickly through membranes via filtration or diffusion. Simple squamous epithelia are found in capillaries, alveoli, glomeruli, outer layer of skin and other tissues where rapid diffusion is required.
- Cells of epithelial tissue are tightly packed and form a continuous sheet. They have almost no intercellular spaces. All epithelia is usually separated from underlying tissues by an extracellular fibrous basement membrane. The lining of the mouth, lung alveoli and kidney tubules all are made of epithelial tissue.
- The basal layer of this tissue is cuboidal, and becomes increasingly flattened as it reaches the surface. Stratified squamous epithelia can be keratinized or nonkeratinized, depending on the location it is found in. Keratinized epithelium, also called "cornified" is composed of numerous layers of dead squamous cells.
Ch. 22 Art Questions
|front 9 Which of the following is NOT a function of the larynx?||back 9 serving as part of the respiratory zone|
|front 11 What type of epithelial tissue forms the walls of the alveoli?||back 11 simple squamous epithelium|
|front 12 Where does gas exchange occur in the respiratory system?||back 12 alveoli|
- Most of the respiratory passageways, from the nasal cavity through the bronchi, are lined by ciliated, pseudostratified columnar epithelium with goblet cells. Bronchioles are lined by simple cuboidal epithelium. (Lung alveoli, in contrast, are lined by very thin simple squamous epithelium.)
- The Alveolus. An alveolus is composed of a single layer of epithelial cells surrounding a lumen, and surrounded by a basket network of myoepithelial cells (their cell bodies are in green in this diagram). This is surrounded by a basement membrane (made of connective tissue proteins).
- The larynx is part of the respiratory system. Explanation: The larynx (also called the voice-box) is a cartilaginous structure on top of the trachea (also called the windpipe). It contains the vocal cords.
Epithelium (/ˌ?p?ˈθiːli?m/) is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue. All glands are made up of epithelial cells. Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing.
- Epithelium (/ˌ?p?ˈθiːli?m/) is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue. All glands are made up of epithelial cells. Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing.
- All materials entering or leaving the body must ultimately cross at least one layer of epithelial tissue. In general, four functions may be attributed to epithelial tissues: (1) protection of the underlying tissues, (2) absorption, (3) secretion, and (4) reception of sensory stimuli.
- Special connective tissue consists of reticular connective tissue, adipose tissue, cartilage, bone, and blood. Other kinds of connective tissues include fibrous, elastic, and lymphoid connective tissues.
Updated: 2nd October 2019