edukidlearning-blog

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Excretion system also does the function of caring for the concentration of fluid in the body. The concentration control of body fluid is a cooperation of 3 organ systems, namely:  the hormone system, blood circulatory system, and excretion system. Two types of hormones which play a role in the excretory system are the ADH and Aldosterone.

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Urine formation consists of 3 processes, namely filtration, reabsorption, secretion.

Filtration happens in the glomerulus when the blood brought by the artery enters the Bowman’s capsule. The results of filtration are water and the low molecular weight of molecule.

Reabsorption happens in the nephron vessel; these are proximal tubule, loop of henle, distal tubule, and collecting canal. Water, glucose, amino acids, and minerals are needed to be absorbed from the tubule then enter the blood capillary.

Secretion is the opposite of reabsorption where the hydrogen, potassium, creatinin, medicines, and uric acid flow from the blood vessel to the collecting canal. The secretion also happens in the nephron vessel.

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Water balance inside the body is affected by the activity, the food types, metabolism, environment temperature, and environment humidity.

One of the main functions of the kidney is keeping the water balance. Normally, our body accepts 1500 ml water every day. Therefore, the fluid excreted is also the same amount.

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Every metabolism and respiration always produces residual substance which is useless and poisonous to the body. Therefore, the residual substance must be excreted soon.

In this case, the excretory system functions especially in the dumping of the metabolism wastes.

The kidneys, lungs, digestive organ, and skin are the organs of the excretion system.

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Physical accidents cause skin to become bruised or pained.

When injured, skin produces new cells in its epidermis and repairs tears in the dermis.

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Morning sunbathing can stimulate the vitamin D formation at the epidermis layer by changing the pro-vitamin D into vitamin D. The vitamin D is important to our health because it is needed for bone formation and it helps absorb calcium and phosphorus deposit inside the body. The lack of vitamin D can cause rickets.

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Skin cancers are cancers that arise from the skin. They are due to the development of abnormaal cells that have the ability to invade or spread to other parts of the body. There are three main types of skin cancers: basal-cell skin cancer (BCC), squamous-cell skin cancer (SCC) and melanoma.[1] The first two, along with a number of less common skin cancers, are known as nonmelanoma skin cancer (NMSC). Basal-cell cancer grows slowly and can damage the tissue around it but is unlikely to spread to distant areas or result in death.

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As a response to stimulus, the direction of a plant’s motion is not always affected by the direction of stimulus. This type of plant motion is known as nastic. Nasty motion is categorized into five types, i.e : photonasty, seismonasty, thermonasty, nyctinasty, and complex nasty.

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Plants can respond to the stimulus originating externally by moving its body partially. The motion of plants which is affected by the direction of stimulus is called tropism motion. Tropism which is directed towards the source of stimulus is called positive tropism, whereas tropism which is directed away from the source of stimulus is called negative tropism.

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The movement of a plant as response to stimulus from external body is called kinesis and it is divided into three types. The following are three types of the kinesis movement.

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One of the characteristics of an organism is the ability to move. Humans and animals move to do their activities and fulfill their needs. As an organism, can a plant move as well?

Plants also perform motion, although they cannot reposition themselves the way humans and animals do. Plant movement is limited and only performed by certain parts, such as the buds, roots, and leaves.

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The lymphatic system is closely related to blood circulation. Excess fluid that leaks out of blood circulation are picked up by lymphatic vessels, and they are transported to veins near the heart.

The lymphatic system is a group of organs, connected by vessels, which carries tissue fluid and as a place for proliferation of white blood cells. These white blood cells destroy bacteria, viruses, and other microscopic organisms inside the human body.

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The blood pressure is the pressure at blood that presses the inner walls of blood vessels.  It is also the forces that enable blood to circulate continuously even between the heartbeats. Blood pressure can be measured at the large arteries, such as at the upper arms (Brachial artery). Blood pressure is expressed by two numbers, which expresses systolic and diastolic pressure.

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Blood at human body always circulate inside the blood vessels, so it is called vascular system. There are three types of blood circulation; that are coronary circulation, pulmonary circulation, and systemic circulation.

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The circulatory system consisting of the heart, arteries, capillaries, and veins, is the pumping mechanism that transports blood throughout the body.

In the heart, the left ventricle contracts, pushing red blood cells into the aorta, the body’s largest artery. From here, blood moves through a series of increasingly smaller arteries, until it reaches a capillary, the junction between arteries and veins. Here oxygen molecules detach from the red blood cells and slip across the capillary wall into body tissue.

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Another chemical designation that needs to be checked before blood transfusion is the Rh factor.During pregnancy, a mother has to check the Rh factor that is found in her blood in order to anticipate what action is needed to be done if the baby is expected to have a different Rh factor from the mother.

[edukidlearning-blog]

Another chemical designation that needs to be checked before blood transfusion is the Rh factor.During pregnancy, a mother has to check the Rh factor that is found in her blood in order to anticipate what action is needed to be done if the baby is expected to have a different Rh factor from the mother.