June 1, 0 Comments Epithelial Tissue Epithelial tissue is a sheet of cells that covers a body surface or lines a body cavity. Two forms occur in the human body: Covering and lining epithelium— forms the outer layer of the skin; lines open cavities of the digestive and respiratory systems; covers the walls of organs of the closed ventral body cavity. Glandular epithelium— surrounds glands within the body.
Fish are animals that are cold-blooded, have fins and a backbone. Most fish have scales and breathe with gills. Approximately, 22, species of fish began evolving million years ago. The largemouth bass illustrated above has the typical torpedo-like fusiform shape associated with many fishes.
Fins are appendages used by the fish to maintain its position, move, steer and stop. They are either single fins along the centerline of the fish, such as the dorsal back fins, caudal tail fin and anal fin, or paired fins, which include the pectoral chest and pelvic hip fins.
Fishes such as catfish have another fleshy lobe behind the dorsal fin, called an adipose fat fin that is not illustrated here.
The dorsal and anal fins primarily help fish to not roll over onto their sides. The caudal fin is the main fin for propulsion to move the fish forward. The paired fins assist with steering, stopping and hovering.
Scales in most bony fishes most freshwater fishes other than gar that have ganoid scales, and catfish which have no scales are either ctenoid or cycloid. Bass and most other fish with spines have ctenoid scales composed of connective tissue covered with calcium.
Most fishes also have a very important mucus layer covering the body that helps prevent infection. Anglers should be careful not to rub this "slime" off when handling a fish that is to be released.
See Scales for more. In many freshwater fishes the fins are supported by spines that are rigid and may be quite sharp thus playing a defensive role.
The soft dorsal and caudal fins are composed of rays, as are portions of other fins. Rays are less rigid and frequently branched. The gills are the breathing apparatus of fish and are highly vascularized giving them their bright red cover.
An operculum gill cover that is a flexible bony plate that protects the sensitive gills. Paired nostrils, or nares, in fish are used to detect odors in water and can be quite sensitive. Eels and catfish have particularly well developed senses of smell.
The larger it is, the bigger the prey it can consume. Fish have a sense of taste and may sample items to taste them before swallowing if they are not obvious prey items. Most freshwater fishes in Florida are omnivorous eating both plant and animal matter. Some are primarily piscivorous eating mostly other fish.
The imported grass carp is one of the few large fishes that are primarily herbivorous eating plants.
Fish may or may not have teeth depending on the species.Standard anatomical terms of location deal unambiguously with the anatomy of animals, including humans.. All vertebrates (including humans) have the same basic body plan – they are strictly bilaterally symmetrical in early embryonic stages and largely bilaterally symmetrical in adulthood.
That is, they have mirror-image left and right halves if divided down the middle. Avian Anatomy. As an avian veterinarian, I often use words like choana and cloaca, and when I do, I can easily visualize in my mind exactly what these body parts look like, and it's hard for me to realize that often, the owner doesn't understand what I'm heartoftexashop.com's take a learning tour through the bird, both externally and internally, so that bird owners will have a better idea of the anatomy.
Surface Anatomy Organ Location Surface Anatomy Assignment 8th November Lungs The lungs extend from the diaphragm to just slightly superior to the .
Rugae is a term used in anatomy that refers to a series of ridges produced by folding of the wall of an organ. Most commonly the term is applied to the internal surface of the stomach (gastric rugae. A plane is a two-dimensional surface — its dimensions are length and width.
The body reference planes are used to locate or describe the location of structures in the body. The base of the lung is formed by the diaphragmatic surface. It rests on the dome of the diaphragm, and has a concave shape.
This concavity is deeper in the right lung, due to the higher position of the right dome overlying the liver. The costal surface is smooth and convex. It .