Method of Carbon Dioxide Transport in the Blood & Lungs 6:04 Blood Types: ABO System, Red Blood Cell Antigens & Blood Groups 7:42 Rh Blood Group, Rh Factor & Erythroblastosis Fetalis 6:58 Heart | Anatomy, Parts & Diagram 6:44 Cardiac Cycle | Definition, Phases & Diagram 6:37...
What are the steps of muscle contraction and relaxation? First, an action potential occurs at the muscle cell membrane (also called the sarcolemma). Next, calcium is released from the sarcoplasmic reticulum and floods the cell. Then, the regulatory proteins detach from actin, allowing myosin to ...
2. Cardiac Muscle: Cardiac muscle is involuntary muscle. This type makes up the walls of the heart and creates the steady, rhythmic pulsing that pumps blood through the body from signals from the brain. This muscle type also creates the electrical impulses that produce the heart’s contractions...
somewhat funnel-shaped portion of the stomach; and thepylorus, a narrowing where the stomach joins the small intestine. Each of the openings, the cardiac and the pyloric, has asphincter musclethat keeps the neighbouring region closed, except when food is passing through. In this manner, food ...
This is also valid in a range of muscle length which is regarded as physiological.doi:10.1007/BF00579854R W GülchR JacobSpringer-VerlagPflügers ArchivGulch, RW, Jacob, R (1975) Length-tension diagram and force-velocity relations of mammalian cardiac muscle under steady-state conditions. ...
A highly specialized form of the endoplasmic reticulum shows up in somemuscle cells, calledmyocytes. This form, called thesarcoplasmic reticulum, is usually found in cardiac (heart) and skeletal muscle cells. In these cells, the organelle manages the balance of calcium ions the cells use to ...
is among the largest unicellular species. A unicellularorganism‚ also known as a single-celledorganism‚ is anorganismthat consists of only one cell‚ unlike a multicellularorganismthat consists of multiple cells. Historically the simple single celledorganismshave sometimes been referred to ...
of the tissues of multicellular animals, molecules are taken in either by their directdiffusionthrough thecell wallor by the formation by the surface membrane of vacuoles that carry some of the environmental fluid containing dissolved molecules. Within the cell,cyclosis(streaming of the fluid ...
anatomy of earthworm externally, a thin non-cellular cuticle covers the body wall of the earthworm. underneath this cuticle, a layer of the epidermis, followed by two muscle layers and coelomic epithelium (inner layer) is sheathed. the epithelium consists of a single layer of glandular columnar ...
The O2-Mb bond is reversible, and the direction of the reaction is dependent on the concentration of O2 (partial pressure or pO2) in the surrounding fluids. Myoglobin Structure and Function Myoglobin binds and stores oxygen inside of skeletal and cardiac muscle cells. The heme group consists ...