two types of tissue: white pulp and red pulp.
Lymphocytes
white pulp
Penelstitis is connected within the veins in your brain, some of these veins lead to the spleen. And the Penelstitis produces the blood as the blood vessels are being mulitiply produced.
red pulp is a blood containing region which lie in the spleen, in which open circulation takes place. the open circulation is a pathway taken by the blood in the spleen to flow from the central artery in the white pulp( which will be explained later) through the red pulp and back again to circulatory vessel (vein). blood flow in the open circulation will be exposed to lymphocyte and macro phages in the billroth's cord before it enters splenic sinusoids. this will give better exposure for the blood against any antigen that might present. while the white pulp is the light stained region in the spleen. it consists of central arteries( splenic.a - trabecular.a- central.a), which been sorrounded by periarterial lymphatic sheath( occupied by T lymph). the latter will be sorrounded by lympoid nodules called malphigian corpuscle( occupied by b lymph). between the white and red pulp, there is a marginal zone. this site is the site where highest accumulation of lymphocyte and macrophages. there are also lymphocyte from the red pulp an gather here. it can be said that marginal zone acts as initial immune reaction region.
Parenchymal cells.
The spleen is not necessary for life but does have important functions: 1. Defense -macrophages lining sinusoids of spleen remove microorganisms from blood and phagocytose (eat) them. 2. Hematopoiesis -monocytes (white blood cell) and lymphocytes (white blood cell) complete their development in the spleen. 3. Red blood cell and platelet destruction-macrophages remove worn-out RBCs and imperfect platelets and destroy them by phagocytosis (eating); also salvage iron and globin from destroyed RBCs 4. Blood reservoir -pulp of spleen and its sinuses store blood for when you really need extra blood. If you noticed a "stitch" in your side when running hard, that is the spleen adding blood to the system so you will get oxygen.
The spleen.
white pulp
Pulp is typically white or off-white in color, as it is primarily composed of cellulose fibers derived from plants like wood or cotton. The color may vary slightly depending on the source material and any bleaching processes used during production.
white pulp
Red pulp filters the blood of antigens and microorganisms.
Secondary lymphoid organs and tissues are the sites where lymphocytes are most active. The white pulp of the spleen is the common site for plasma cells to develop. Macrophages are also active in the spleen red pulp; where they engulf blood-borne antigens to be presented to T lymphocytes in the circulation.
Secondary lymphoid organs and tissues are the sites where lymphocytes are most active. The white pulp of the spleen is the common site for plasma cells to develop. Macrophages are also active in the spleen red pulp; where they engulf blood-borne antigens to be presented to T lymphocytes in the circulation.
red pulp
Red Pulp
Red Pulp
Penelstitis is connected within the veins in your brain, some of these veins lead to the spleen. And the Penelstitis produces the blood as the blood vessels are being mulitiply produced.
. If you were to take a cross section of the spleen, you would find that it is separated in to two distinct types of tissue. They are called red pulp and white pulp. I'll give you one guess how they got those names. Red and white pulp have different functions. Red pulp contains blood filled sinuses (a fancy name for spaces). The primary function if red pulp is to act as a mechanical filter, removing old red blood cells from general circulation. White pulp contains many B and T type lymphocytes. These cells are vital to the functioning of the immune system. Naturally, this means that the white pulp plays an important role in fighting infections within the body. The spleen is also a secondary manufacturer of red blood cells. In adults most red blood cells are made in the long bones such as your femur, but the spleen is a important producer of red blood cells in a fetus. Once the long bones are fully developed, the spleen's production of red blood cells becomes insignificant.