Smooth muscle cells

One very important involuntary muscle is your heart, which keeps beating all day and night. Other involuntary muscles help digest food and are found in your stomach and intestines.

Cardiac muscle

Four characteristics define cardiac muscle tissue cells: they are involuntary and intrinsically controlled, striated, branched, and single nucleated. Cardiac muscle is considered to be an involuntary tissue because it is controlled unconsciously by regions of the brain stem and hypothalamus.

There are about 600 muscles in the human body. The three main types of muscle include skeletal, smooth and cardiac.

Muscle tissue

• skeletal muscle (or the striated voluntary muscle) tissue.
• smooth muscle (or the non-striated involuntary muscle) tissue.
• cardiac muscle (or the heart muscle) tissue.

Muscle tissue is also found inside of the heart, digestive organs, and blood vessels. In these organs, muscles serve to move substances throughout the body.

Cardiac muscle is only found in the heart, and although it is striated like skeletal muscle, it functions involuntarily. Cardiac and most smooth muscles are autorhythmic-they are capable of contracting spontaneously without nervous or hormonal stimulation.

Muscular tissue consists of elongated cells, also called muscle fibres. This tissue is responsible for movement in our body. Main function of muscular tissues is to provide movement to the body. Muscles contain special proteins called contractile proteins, which contract and relax to cause movement.

Smooth muscle is organized in two ways: as single-unit smooth muscle, which is much more common; and as multiunit smooth muscle. The two types have different locations in the body and have different characteristics.

Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control. Smooth muscle fibers are located in walls of hollow visceral organs, except the heart, appear spindle-shaped, and are also under involuntary control.

You can find smooth muscle in the following places:

• Walls of blood vessels.
• Walls of stomach.
• Ureters.
• Intestines.
• In the aorta (tunica media layer)
• Iris of the eye.
• Prostate.
• Gastrointestinal Tract.

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.

: muscle tissue that is marked by transverse dark and light bands, is made up of elongated usually multinucleated fibers, and includes skeletal muscle, cardiac muscle, and most muscle of arthropods — compare smooth muscle, voluntary muscle.

Smooth Muscle Examples They are found in the body’s hollow organs like the intestines, digestive tracts, urinary bladder, ureters, and the blood vessels of the circulating blood system. They are also found in the wall of the lungs and the reproductive system of both genders.

Skeletal System

Smooth Muscle: Skeletal, cardiac, and smooth muscle. Smooth muscle is responsible for the involuntary contractions of the internal organs of the body.

Structure

• Comparison of types.
• Skeletal muscle.
• Smooth muscle.
• Cardiac muscle.
• Skeletal muscle.
• Smooth muscle.
• Cardiac muscle.

Muscle is one of the four primary tissue types of the body, and the body contains three types of muscle tissue: skeletal muscle, cardiac muscle, and smooth muscle (Figure 7.2).

Unlike skeletal muscle, smooth muscle can never be under your control. Cardiac muscle is also an involuntary muscle, found only in the heart.

Skeletal muscle, smooth muscle and cardiac muscle are the three different kinds of muscular tissues present around bones of our body, around the alimentary canal and heart wall respectively. So, the correct option is ‘None of the above’.

Muscular tissue is a specialized tissue in animals which applies forces to different parts of the body by contraction. It is made up of thin and elongated cells called muscle fibers. It controls the movement of an organism. The cytoplasm in the muscle fibers is called sarcoplasm.

The muscular system’s main function is to allow movement. When muscles contract, they contribute to gross and fine movement.

The movements and motions that joints and their muscles are capable of include:

• Abduction.
• Adduction.
• Flexion.
• Hyperflexion.
• Extension.
• Hyperextension.
• Rotation.
• Internal rotation.

Terms in this set (5)

• Excitability- can be stimulated by chemical signals, nerves and stretch.
• Conductivity- the signal for a muscle to contract is spread from the point of stimulation throughout the entire muscle.
• Contractility- ability of the muscle to shorten.
• Extensibility-
• Elasticity-

31 Cards in this Set

What are the five functions of Muscle Tissue	1. producing body movements 2. stabilizing body positions 3. regulating organ volume 4. moving substances within the body 5. generating heat
Where would you find elasticity?:	Skeletal muscle tissue
What makes muscles contract?	Calcium