Describe how a disease manifects itself in the human body with the help of two examples?
Answers
We know there are many tissues in our body. The tissues collectively make up the organs or the physiological system of a body of an individual. These organs together form organ system and carry out distinct functions. For example, bones and muscles together form musculoskeletal system.
The musculoskeletal system helps in the movement of the body and holds together the body parts. Similarly, stomach and intestine make up the digestive system. This system helps in digestion process. Similarly, there is cardiovascular system, lymphatic system, nervous system, urinary system, endocrine system, etc.
If an individual is suffering from any disease, the functioning of the system or the system’s appearance will vary from normal. All these changes develop signs and symptoms. This is known as the manifestation of diseases. For an example cough, headache, inflammation, fits, vomiting, wound with pus, or even loose motions are symptoms that indicate that a person may be is suffering from a specific disease.
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Symptoms or manifestation are the signs indicating an underlying disease such as abdominal cramps, headache, fever, among numerous other symptoms. Symptoms depend on the type of disease. Two or more disease can have common symptoms. Therefore, symptoms of diseases cannot indicate the exact disease.
For instance, if a person is having a headache, he/she may have normal stress, fever, migraine, or even in rare cases, it is a symptom of meningitis. This is why physicians search for signs of diseases on the basis of symptoms. However, to pinpoint exact disease physicians/doctors runs a series of the laboratory test on the person.
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Answer:
distance of 58 million km, while Venus orbits at a distance of 108 million km. Mercury takes 88 Earth days to complete an orbit, and Venus takes 225 days to orbit the Earth.
And as you’d probably guess, Venus and Mercury are the two hottest planets in the Solar System, but not in the order that you’d think. Even though Mercury orbits closer to the Sun than Venus, it lacks an atmosphere. The side facing the Sun is baked, with a temperature of 425 degrees Celsius, the side facing away from the Sun cools down to -193 degrees Celsius. Venus, on the other hand, has an incredibly thick atmosphere and traps the heat from the Sun. No matter where you go on the planet, the temperature on the surface of Venus is always 462 degrees Celsius.
The composition of Venus and Mercury is similar, they’re both terrestrial planets made of rock and metal. Mercury is more dense than Venus and thought to consist of 60-70% metal, with the rest rock. As mentioned above, Mercury lacks an atmosphere, while Venus has the thickest atmosphere of all the terrestrial planets. The temperatures and pressures are so extreme on the surface of Venus that spacecraft only last a few hours before being crushed and baked.
Both Venus and Mercury are within the orbit of Earth. This means that they’re always located near the Sun in the sky. Sometimes they rise before the Sun, and then fade away as the Sun rises, and sometimes they’re set after the Sun. They appear as the sky darkens, and then pass below the horizon within a few minutes. You need to have a clear view to the horizon to see Mercury, and know when to go looking. Venus, on the other hand can appear quite high in the sky, and is very bright. In fact, Venus is the brightest object in the sky after the Moon.