The muscle tissue that shows no striations is
Unlike cartilage, bone
Smooth muscle can be found in the walls of hollow organs such as the urinary bladder, uterus, stomach, and intestines, as well as in the walls of passageways such as the circulatory system’s arteries and veins, and the respiratory, urinary, and reproductive systems’ tracts ((Figure)ab). Smooth muscle can also be found in the eyes, where it controls the size of the iris and the shape of the lens, and in the skin, where it causes hair to stand up in reaction to cold or fear.
Smooth muscle fibers have a single nucleus and are spindle-shaped (wide in the middle and tapered at both ends, like a football); they range in length from 30 to 200 m (thousands of times shorter than skeletal muscle fibers), and they contain their own connective tissue, endomysium. Smooth muscle fibers have actin and myosin contractile proteins, as well as thick and thin filaments, but no striations or sarcomeres. Dense bodies hold these thin filaments in place. A thick body is attached to the sarcolemma and is similar to the Z-discs of skeletal and cardiac muscle fibers. Calcium ions are supplied by the SR in the fibers as well as sequestration from the extracellular fluid through membrane indentations known as calveoli.
Characteristics of epithelia include all of the following except
Tissues are made up of similar types of cells that function together to accomplish a common goal, and histology is the analysis of biological organization at the tissue level. Animals have four different types of tissues.
The number of cell layers that make up epithelial tissues and the form of the cells are used to classify them. Simple epithelium is composed of a single layer of cells while stratified epithelium comprises several layers.
Flat (squamous = “scale-like”), cube-shaped (cuboidal), or tall epithelial sells are all possible (columnar). As a result, three terms (e.g., simple columnar epithelium, stratified, squamous epithelium, etc.) are needed to correctly classify the form of tissue.
Binding, help, security, insulation, and transport are all functions of connective tissue. Regardless of their differences, all connective tissues are made up of living cells enclosed in a non-living cellular matrix made up of extracellular fibers or some other ground material. The type of matrix thus distinguishes the various connective tissues. Bone, cartilage, tendons, ligaments, loose connective tissue, adipose (fat) tissue, and even blood are all examples of connective tissue (although some authorities would classify blood as a vascular tissue).
Loose connective tissue functions in all of the following ways except
Striated muscle tissue is made up of sarcomeres, which are repeating functional units. The presence of sarcomeres appears as a set of bands evident along the muscle fibers, which is responsible for the striated appearance found in microscopic images of this tissue. There are two kinds of striated muscles: striated muscles and striated muscles.
Skeletal muscle fibers, blood vessels, nerve fibers, and connective tissue make up skeletal muscle. Skeletal muscle is coated in epimysium, which allows it to maintain structural integrity despite contractions. The perimysium divides the muscle fibers into fascicles, which are encased in collagen and endomysium. Sarcolemma, sarcoplasm, and sarcoplasmic reticulum are all found in each muscle fiber. A sarcomere is the functional unit of a muscle fiber. [two]
Between the epicardium and the endocardium in the heart is cardiac muscle.
 Cardiac muscle fibers normally only contain one nucleus, located in the central region. They have a lot of mitochondria and myoglobin in them.  Cardiac muscle cells are unicellular, unlike skeletal muscle cells.  Intercalated disks, which contain gap junctions and desmosomes, bind these cells to one another. (5)
Each of the following is an example of dense connective tissue except
The type of epithelium that is found lining internal body compartments and blood vessels isA. Simple squamous epitheliumB. stratified squamous epitheliumC. Simple cuboidal epitheliumD. Stratified cuboidal epitheliumE. transitional epithelium
Which of the following statements about simple epithelia is incorrect?
A. They have little mechanical protectionB. They are found in areas where secretion or absorption takes placeC. They line internal compartments and passagewaysD. They shield surfaces from mechanical or chemical stressE. They are avascular.
But for the above, loose connective tissue performs any of the following functions.
B. helping epitheliaA. transporting substances between cells D. Lipid storageC. Anchoring blood vessels and nerves E. filling in the gaps between the organs
Cells that divide to create daughter cells that differentiate into various cell types in response to injury or infection are called proliferating cells.
Mast cellsB. fibroblastsC. Plasma cellsD. Mesenchymal cellsA. Mast cellsB. fibroblastsC. Plasma cellsD. Mesenchymal cells
lymphocytes of E.
The red colour and heat associated with inflamed tissue is the product ofA. Increased numbers of white cells in the injured areaB. local vasodilationC. Loss of blood from the injured tissueD. Increased numbers of the bacteria in the region of a woundE. the release of heparin from injured cells