The term pericardium is derived from the Greek prefix peri- (“around”) and kardia (“heart”), implying a structure that envelops or encloses the heart. Morphologically, the pericardium is a fluid-filled sac-like structure that surrounds the heart. Anatomic Structure The pericardium is a double-walled structure, made up of an outer fibrous layer and an inner serous layer. The fibrous layer is a single, connective tissue layer, made up of collagen (type I and type III mainly) and elastin fibers; it is elastic and yet non-distensible. This layer of the pericardium is held in position cranially by its membranous folds interdigitating with the tunica adventitia of the great vessels; caudally by ligaments connecting to the central tendon of the diaphragm;
Smooth muscle The function of the Smooth muscle are the muscle we do not consciously control eg those that are found in the walls of blood and lymphatic vessels, in respiratory, digestive and genito-urinary systems. These muscles work automatically weather we want them to or not. The structure of the smooth muscle is they have spindle shaped cells with no distant cell membrane and only one nucleus, bundles of the fibre we see with the naked eye. Skeletal muscle the function is these are the muscle which we consciously control eg or arms, legs. If we want to walk we do so.
The pericardium- It has two layers. (i) An outer layer which contains a fibrous covering that wraps around the heart and holds it in place. (ii) An inner layer which has special fluid to lubricate the heart preventing friction from occurring. 2. The myocardium- this contains a strong layer of cardiac muscle
The cytoplasmic dynein goes in the direction of the minus terminus of the microtubule. While no molecule is bound to the AAA1 ATP binding site, the dynein is securely bound to the microtubule. When ATP binds to the AA1 ATP binding site, the dynein quickly unbinds the tight bond between itself and the microtubule. When ATP is bound to the site. ADP is released as well as inorganic phosphate.
Some of tissues in the bones of the skeletal system are marrow, cartilage, ligaments, and bone tissue, and the cells inside are osteoprogenitor, osteoblasts, osteoclasts, and osteocytes. Inside of the muscular system are the skeletal tissues. In the respiratory, digestive, and excretory systems there are smooth muscle tissues and cells. In the nervous system, there is a nerve network tissue with neuron cells. Finally, inside the muscular system, there are skeletal, smooth, and cardiac tissues and cells.
It is an elongated muscle which allows for slow and regular contractions. The nuclei of the smooth muscle cells are centrally located and elongated, similarly to the shape of the cell. In pulmonary blood vessels and the bronchus, this muscle is used to maintain the shape and rigidity of the structure, which it does so involuntarily. The function of the pulmonary vein is the opposite to that of the pulmonary artery, in being that the pulmonary vein carries oxygenated blood back to the heart in order for the blood to be pumped around the body. Similarly to the pulmonary artery, the pulmonary vein has very thin walls although the vein’s walls are even thinner than those of the pulmonary artery due to the wider lumen and low pressure of the blood.
The essential function of the patella lies in the ability of its healthy hyaline cartilage to transmit forces to subcondral and cancellous bone. Patello-femoral joint forces vary with activity, being 0.5 times body weight during walking, 3.3 times body weight when ascending or descending stairs, and as much as 6.0 to 7.0 times body weight when squatting (Mike Reynold 2009) 15. Several investigators
The Muscular System is an organ system that contains the skeletal, smooth, and cardiac muscles. It 's what makes the body able to move. Cardiac muscle a different than skeletal muscles because the main cardiac muscle is the heart which is controlled by the nervous system. Smooth muscles which are controlled directly by the autonomic nervous system and cannot be moved by conscious thought. Skeletal muscle system can all be moved voluntarily.
Typical Adult Anatomy: Bones A fully functioning hip joint is a vital portion of anatomy, from birth to advanced adulthood. The hip is responsible for the stabilization of a person’s body weight whether the person is static or dynamic. The physical joint is classified as a ball-and-socket joint, the head of the femur articulates with the acetabulum of the pelvis. With how the head is oriented in the socket, the joint is able to withstand tremendous amounts of pressure and allows it to be a strong and stable portion of the human anatomy. The design of the hip is actually very flexible and allows for a wide range of movements in different axis.
The heart is a hollow muscle that is centered in the cardiovascular system and pumps the blood throughout the body. It is characteristic is the cardiac muscle with a small size and many mitochondria. They contain very rare of cell nuclei and intercalated discs that specialized connections of intercellular. This organ is made up of four chambers: right atrium, right ventricle, left atrium, and left ventricle. The atriums collect the blood from the pulmonary circulation while the ventricles pump the into the systemic circulation.