Prepared by : Amal Awad Al-Harbi. The circulatory system consists of the blood vascular systemthe lymphatic vascular system composed of The heart The.

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Prepared by : Amal Awad Al-Harbi

The circulatory system consists of the blood vascular systemthe lymphatic vascular system composed of The heart The arteries The veinsThe capillaries pumps the blood carry oxygenated blood and nutrients to the tissues They becomes thinner as they branch forming arterioles consists of a diffuse network of thin tubules through which gas exchange between blood and tissues takes place carry deoxygenated blood, rich in carbon dioxide and other metabolic products from the tissues to the heart Prepared by : Amal Awad Al-Harbi

Structure of the blood vessels All blood vessels have a number of structural features in common. They are composed of three layers called 1- tunica intima 2- tunica media 3- tunica adventitia Prepared by : Amal Awad Al-Harbi

Structure of the blood vessels Tunica intimaTunica mediaTunica adventitia Consists of 2 components A layer of squamous endothelial cells lining the vessel interior surface, and rest on a basement membrane called the basal lamina A subendothelial layer of loose connective tissue that may contain some smooth muscle cells, which tend to be arranged longitudinally Consists of layers of circular smooth muscle cells with elastic and collagen fibers interposed among them It is an areolar connective tissue layer consisting of longitudinally collagen and elastic fibers gradually becomes continuous with the enveloping connective tissue of the organ through which the vessel is running Prepared by : Amal Awad Al-Harbi

LayerThe artery Tunica intima -Consists of 2 components: a) A layer of squamous endothelial cells lining the vessel interior surface, and rest on a basement membrane called the basal lamina. b) A subendothelial layer of loose connective tissue that may contain some smooth muscle cells, which tend to be arranged longitudinally. -Is separated from the media by a well developed layer of elastic connective tissues, called the internal elastic lamina. Tunica media -Consists of layers of circular smooth muscle cells with elastic and collagen fibers interposed among them. - The thickest layer of the vessel wall. Tunica adventitia -It is an areolar connective tissue layer consisting of longitudinally collagen and elastic fibers. -This layer gradually becomes continuous with the enveloping connective tissue of the organ through which the vessel is running. -Rich in elastic fibers.

Prepared by : Amal Awad Al-Harbi

LayerThe vein Tunica intima -Consists of 2 components: a) A layer of squamous endothelial cells lining the vessel interior surface, and rest on a basement membrane called the basal lamina. b) A subendothelial layer of loose connective tissue that may contain some smooth muscle cells, which tend to be arranged longitudinally. -Is not separated from the media by the internal elastic lamina. Tunica media Consists of layers of circular smooth muscle cells with elastic and collagen fibers interposed among them. -Much thinner than that of the artery. Tunica adventitia -It is a connective tissue layer consisting of longitudinally collagen and elastic fibers. -This layer gradually becomes continuous with the enveloping connective tissue of the organ through which the vessel is running. - Rich in collagenous fibers. - The thickest layer of the vessel wall.

Prepared by : Amal Awad Al-Harbi

LayerThe arteryThe vein Tunica intima -Consists of 2 components: a) A layer of squamous endothelial cells lining the vessel interior surface, and rest on a basement membrane called the basal lamina. b) A subendothelial layer of loose connective tissue that may contain some smooth muscle cells, which tend to be arranged longitudinally. -Is separated from the media by a well developed layer of elastic connective tissues, called the internal elastic lamina. -Consists of 2 components: a) A layer of squamous endothelial cells lining the vessel interior surface, and rest on a basement membrane called the basal lamina. b) A subendothelial layer of loose connective tissue that may contain some smooth muscle cells, which tend to be arranged longitudinally. -Is not separated from the media by the internal elastic lamina. Tunica media -Consists of layers of circular smooth muscle cells with elastic and collagen fibers interposed among them. - The thickest layer of the vessel wall. Consists of layers of circular smooth muscle cells with elastic and collagen fibers interposed among them. -Much thinner than that of the artery. Tunica adventitia -It is an areolar connective tissue layer consisting of longitudinally collagen and elastic fibers. -This layer gradually becomes continuous with the enveloping connective tissue of the organ through which the vessel is running. -Rich in elastic fibers. -It is a connective tissue layer consisting of longitudinally collagen and elastic fibers. -This layer gradually becomes continuous with the enveloping connective tissue of the organ through which the vessel is running. - Rich in collagenous fibers. - The thickest layer of the vessel wall.

The Urinary System Prepared by : Amal Awad Al-Harbi

*The kidney is bean-shaped with a concave medial border, the hilum (where nerves enter, blood and lymph vessels enter and exit and the ureter exits) and a convex lateral surface. *The kidney is surrounded by a mass of adipose tissue. *The kidney tissue surrounds a cavity, the renal pelvis. This pelvis is the expanded upper end of the ureter. *The functional unit of the kidney is the uriniferous tubule which consists of the nephron and the collecting duct into which the renal tubule empties its contents. Prepared by : Amal Awad Al-Harbi

The kidney tissue can be divided into : An outer, granular appearing An inner, striated appearing cortexmedulla Prepared by : Amal Awad Al-Harbi

medulla cortex

Prepared by : Amal Awad Al-Harbi

The human medulla, has medullary pyramids. The pyramid tips are called the renal papillae and each is perforated by orifices, the opening of the collecting ducts. From the bases of each medullary pyramid, parallel medullary rays penetrate the cortex. Each ray consists of one or more collecting tubules together with the straight portions of several nephrons. Surrounding each medullary ray in the cortical region are the renal corpuscles and convoluted portions of the nephron. Prepared by : Amal Awad Al-Harbi