Four characteristics define smooth muscle tissue cells: they are involuntarily controlled, not striated, not branched, and singly nucleated. The unconscious regions of the brain control visceral muscle through the autonomic and enteric nervous systems. Thus, visceral muscle is involuntarily controlled.

Smooth muscle lines many parts of the circulatory system, digestive system, and is even responsible for raising the hairs on your arm. In the circulatory system, smooth muscle plays a vital role in maintaining and controlling the blood pressure and flow of oxygen throughout the body.

Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations. They are called involuntary muscles. Cardiac muscle has branching fibers, one nucleus per cell, striations, and intercalated disks. Its contraction is not under voluntary control

Smooth Muscle Tissue

The individual cardiac muscle cell (cardiomyocyte) is a tubular structure composed of chains of myofibrils, which are rod-like units within the cell. The myofibrils consist of repeating sections of sarcomeres, which are the fundamental contractile units of the muscle cells.

Cardiac muscle cells are found only in the heart, and are specialized to pump blood powerfully and efficiently throughout our entire lifetime. Four characteristics define cardiac muscle tissue cells: they are involuntary and intrinsically controlled, striated, branched, and single nucleated

Cardiac muscle tissue is one of the three types of muscle tissue in your body. The other two types are skeletal muscle tissue and smooth muscle tissue. Cardiac muscle tissue is only found in your heart, where it performs coordinated contractions that allow your heart to pump blood through your circulatory system.

Cardiac Muscle Tissue

These neurons are able to receive impulses from multiple neurons via dendrites. The dendrites transmit the signals through the neuron via an electrical signal that is spread down the axon. Bipolar neurons: These neurons send signals and receive information from the world

A multipolar neuron is a type of neuron that possesses a single axon and many dendrites (and dendritic branches), allowing for the integration of a great deal of information from other neurons. These processes are projections from the neuron cell body.

Giant Multipolar Neuron

Another example of hyaline cartilage is the tissue found in the walls of the respiratory tract. This includes the bronchi, the nose, the rings of the trachea, and the tips of the ribs

Where bone ends meet to form a joint, they are covered by hyaline cartilage. This cartilage appears bluish white and glistening in a normal healthy joint. Its primary function is to provide some cushioning and minimize friction between the bone ends.

Hyaline Cartilage

Elastic cartilage provides strength, and elasticity, and maintains the shape of certain structure such as the external ear. It has a perichondrium.

Elastic cartilage , sometimes referred to as yellow fibrocartilage, is a type of cartilage that provides both strength and elasticity to certain parts of the body, such as the ears. Within the outer ear, it provides the skeletal basis of the pinna, as well as the lateral region of the external auditory meatus.

Elastic Cartilage

Fibrocartilage provides the tough material of the intervertebral discs; the intraarticular cartilages of the knee, wrist and temporo-mandibular joints; the articular cartilage of the temporo-mandibular joint and of the joint between the clavicle and the sternum.

Fibrocartilage is the tough, very strong tissue found predominantly in the intervertebral disks and at the insertions of ligaments and tendons; it is similar to other fibrous tissues but contains cartilage ground substance and chondrocytes.

Fibrocartilage

Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. These fibers hold connective tissues together, even during the movement of the body.

Collagenous connective tissue is divided into two types, based upon the ratio of collagen fibers to ground substance: Loose (areolar connective tissue) is the most abundant form of collagenous connective tissue. It occurs in small, elongated bundles separated by regions that contain ground substance.

Collagenous Connective Tissue

Areolar connective tissue is a tough and flexible tissue that is the most abundant form of connective tissue in vertebrate organisms

The areolar tissue is found beneath the dermis layer and is also underneath the epithelial tissue of all the body systems that have external openings.

Areolar connective tissue is the type of tissue which connects and surrounds different organs in the human body. The important function of this type of tissue is that it provides nutrition to the cells and also acts as a cushion to protect the organs from various external forces.

Areolar Connective Tissue

Due to its location in the excretory system, especially in the ureters and urinary bladder, one of the primary functions of this tissue is to be an extremely effective permeability barrier, impenetrable to water and most small molecules

Transitional epithelium also known as urothelium is a type of stratified epithelium. Transitional epithelium is a type of tissue that changes shape in response to stretching (stretchable epithelium). The transitional epithelium usually appears cuboidal when relaxed and squamous when stretched.

Transitional Epithelium

Four characteristics define skeletal muscle tissue cells: they are voluntary, striated, not branched, and multinucleated. Skeletal muscle tissue is the only muscle tissue under the direct conscious control of the cerebral cortex of the brain, giving it the designation of being voluntary muscle

Skeletal muscles contain connective tissue, blood vessels, and nerves. There are three layers of connective tissue: epimysium, perimysium, and endomysium. Skeletal muscle fibers are organized into groups called fascicles. Blood vessels and nerves enter the connective tissue and branch in the cell

Skeletal muscle is one of the three significant muscle tissues in the human body. Each skeletal muscle consists of thousands of muscle fibers wrapped together by connective tissue sheaths. The individual bundles of muscle fibers in a skeletal muscle are known as fasciculi.

Skeletal Muscle Tissue

INTESTINAL VILLUS

Intestinal villi are tiny, finger-like projections made up of cells that line the entire length of your small intestine. Your villi absorb nutrients…

STOMACH WALL TISSUE

The wall of the stomach is made up of the mucosa (innermost layer), submucosa, muscle layer, subserosa, and serosa (outermost layer). The stomach is…

LIVER TISSUE

The liver is an organ about the size of a football. It sits just under your rib cage on the right side of your abdomen. The liver is essential for…

GALLBLADDER TISSUE

The gallbladder is a small pouch that sits just under the liver. The gallbladder stores bile produced by the liver. After meals, the gallbladder is…

SALIVARY GLANDS TISSUE

Salivary glands make saliva, which aids in digestion, keeps your mouth moist and supports healthy teeth. You have three pairs of major salivary…

HISTOLOGY ART
Digestive System Tissues

It is critical that we orient ourselves in the direction of greater advancement. I enthusiastically support Vice President Leni Robredo as the next President of the…

The findings show that gene expression levels in skin fibroblasts were altered during the aging process in all three in-vitro aging models, and cell growth rate was lowered, implying that these methods can be used to study skin aging mechanisms as well as drug development screening methods.

Cell growth rate was also used to assess the behavior of skin fibroblasts.

The researchers compared the gene expression patterns to those of a young control group.

This study looked at gene expression in primary human dermal fibroblasts in three different in-vitro aging models-UVB irradiation, the rapid proliferation of human dermal fibroblasts from young and elderly donors.

DIGESTIVE SYSTEM

LAYERS OF THE GASTROINTESTINAL TRACT

MUCOSA

The mucosa, or inner lining of the GI tract, is a mucous membrane. It is composed of (1) a layer of…

INTEGUMENTARY SYSTEM

EPIDERMIS

The outermost layer of the skin, which is composed of squamous cells. This layer includes two distinct types: thick skin and thin…

CIRCULATORY SYSTEM

LAYERS OF THE HEART

Epicardium – the thin, transparent outer layer of the heart wall, is also called the visceral layer of the serous pericardium….