Medullary cavity

the hard external layer of all bones that protects and surrounds the medullary cavity filled with marrow. Spongy or cancellous bone tissue consists of trabeculae that are arranged as rods or plates with red bone marrow in between. (40) Bone Marrow Bone marrow is a soft substance that fills bones and it comes in two types. Type A is yellowish bone marrow that consists chiefly of fat cells and is found especially in the cavities of the long bones. Type B is a reddish bone marrow that contains little

The Haversian canal serves as a passageway for blood vessels and nerves. Volkmann’s canal, which is the other type of canal that runs through the osteon, connects the blood and nerve supply of the periosteum to the central canals and medullary cavity. Osteocytes occupy the lacunae at the junctions of the lamellae and are connected to each other and the central canal via a series of hair like channels called canaliculi . Circumferential lamellae are located just beneath the periosteum, which

The Urinary System is a group of organs in the body concerned with filtering out excess fluid and other substances from the bloodstream. The substances are filtered out from the body in the form of urine. Urine is a liquid produced by the kidneys, collected in the bladder and excreted through the urethra. Urine is used to extract excess minerals or vitamins as well as blood corpuscles from the body. The Urinary organs include the kidneys, ureters, bladder, and urethra. The Urinary system works with

non materials. Diagram 1 – Bone Long Bone. Long bones are strong bones and they are longer in length than they are wide, they must be able to withstand the force created when the body moves, each bone has a tubular shaft with a central cavity and two rounded

molecules e.g. air diffusion in the lungs. The function of simple squamous tissue is absorption & excretion of gases lungs. And the function of stratified squamous is protection due to its many layers and is located in the outer layer of skin, oral cavity lining, esophagus, vaginal & anal canal. Cuboidal- cubed or squarish shaped, has a single nucleus located in the middle. The simple cuboidal tissue can be found in the lines of kidney tubules and glands it’s function is absorption, secretion and

Tilia Lam Microbiology Darla Kelly 11/28/16 Immunology Definition 1. Acute phase proteins: the liver produces these proteins as a way to signal local and systemic responses. Some of these proteins play a role in inflammation response such as fibrinogen for blood clotting and kinin for vasodilation. There are two types of acute phase proteins: positive and negative. 2. APC: stands for Antigen Presenting Cell. It will present the antigen with MHC to T-cells to activate the adaptive immune response

1. What is a membrane potential? Why is it so important in nerves and muscles? Membrane potential is the way in which nerve and muscle tissue respond to rapidly changing external stimuli. Is it important to nerves and muscles because it allows them to react and sense changes. 2. What are neuroglia and what is their function? Neuroglia protect and assist neurons 3. Name and describe the various structures found in a neuron. The various structures of the neuron are the soma, axon, and dendrites

molecules e.g. air diffusion in the lungs. The function of simple squamous tissue is absorption & excretion of gases lungs. And the function of stratified squamous is protection due to its many layers and is located in the outer layer of skin, oral cavity lining, esophagus, vaginal & anal canal. Cuboidal- cubed or squarish shaped, has a single nucleus located in the middle. The simple cuboidal tissue can be found in the lines of kidney tubules and glands it’s function is absorption, secretion and

THE IMMUNE SYSTEM Definition of the Immune System The human immune system is a collective network of tissues, glands, and organs that work in a coordinated effort with each other to guard our bodies from foreign antigens such as viruses, bacteria, and infection causing microorganisms. For the immune system to work properly, two things must happen: first, the body must recognize that it has been invaded, either by pathogens or toxins or by some other threat. Second, the immune response must be

The Human Skeletal System Introduction The human skeletal system is comprised of both fused and individual bones; supported and supplemented by ligaments, tendons, muscles and cartilage. The skeletons purpose is to protect and support the delicate internal organs and provide a framework that allows the body to stand upright and move. It also produces blood cells and stores minerals that our body needs to function effectively. The skeletal system is a very important part of the human body. Without