Is the heart myogenic?
Myogenic heart: The cardiac muscle possesses automaticity and contract spontaneously. A myogenic heart is capable of generating a cardiac contraction independent of nervous input.
In the human heart, contraction is initiated by a special modified heart muscle known as sinoatrial node. Since the heart beat is initiated by the SA node and the impulse of contraction originates in the heart itself, the human heart is termed myogenic. The hearts of vertebrates and molluscs are also myogenic.
- Blood is considered a connective tissue for two basic reasons: (1) embryologically, it has the same origin (mesodermal) as do the other connective tissue types and (2) blood connects the body systems together bringing the needed oxygen, nutrients, hormones and other signaling molecules, and removing the wastes.
- red blood cells, which carry oxygen throughout the body. white blood cells, which fight infections. platelets, which are cells that help you stop bleeding if you get a cut. plasma, a yellowish liquid that carries nutrients, hormones, and proteins throughout the body.
- Approximately 85% of the US Population have the Rh+ Blood Types of A, B, AB or O. Thus, resulting in a very small population of the more rare Rh Negative Blood Types. For many years Type O+ Blood was incorrectly considered to be the Universal Blood Donor.
Skeletal muscle tissue is found in our skeletal muscles; for example, the biceps. Cardiac muscle is found in our heart, and smooth muscle is found in our visceral, or hollow, organs - for example, blood vessels and intestines.
- Cardiac muscle is specialized tissue that is found only in the heart. It has characteristics similar to both smooth and skeletal muscle tissue, as well as specialized properties, that allow it to function with fast but sustained contractions, rapid conduction and coordinated movement.
Name of muscle Function Example in sport Triceps Extend the arm at the elbow Press-up, throwing a javelin Biceps Flex the arm at the elbow Pull-up, drawing a bow in archery Deltoids Move the arm in all directions at the shoulder Bowling a cricket ball Pectorals Adduct the arm at the shoulder Forehand drive in tennis
- The myocardium is the middle muscular layer of the heart's walls and it functions by providing a scaffolding for the heart chambers, assisting in contraction and relaxation of the cardiac walls so that blood can pass between the chambers and electrostimulation conduction through its own tissues and into the epicardium.
Updated: 22nd September 2018