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Answers
1)there should be a diagram in your book:
food is broke down into smaller pieces in mouth and then swallowed .The food goes through the esophagus and reaches the stomach where digestive juices further break down the food and after a few hours it goes to small intestine where the nutrients are absorbed. By the time food reaches the large intestine, the work of absorbing nutrients is nearly finished. The large intestine's main job is to remove water from the undigested matter and form solid waste (poop) to be excreted.
2)The classic five senses are sight, smell, hearing, taste, and touch. The organs that do these things are the eyes, nose, ears, tongue, and skin.Eyes obviously allow us to see. But if you break it down, they do more than just that. Using our eyes, we can judge depth, interpret new information, and identify color (the wavelengths of light that reflect off surfaces). Noses are used to smell scents. They get a sense for what particles are traveling through the air, which can help us identify if dangerous chemicals are nearby. Smell also has the strongest connection to memory; a familiar smell can remind us of things long forgotten. Ears allow us to hear sound - to detect vibrations in the air particles around us. But the inner ear also helps us maintain balance and regulate sinus pressure. This is especially useful when you change altitude (like, for example, when you are flying in an airplane). If you include the inside of the ears, they sense sound, allow balance and regulate pressure. Tongues are used to taste foods, allowing us to figure out if something is going to be useful to our bodies or poisonous. They also allow us to sense hot and cold in food and liquids. Last of all is the skin, which is responsible for what may be the most important senses in the human body. The skin performs a huge number of functions. These include:
Sweating to cool the body
Protection from the elements
3)Each of your kidneys is made up of about a million filtering units called nephrons. Each nephron includes a filter, called the glomerulus, and a tubule. The nephrons work through a two-step process: the glomerulus filters your blood, and the tubule returns needed substances to your blood and removes wastes.
4)The main function of blood vessels is to carry blood through the body. The blood carries oxygen, nutrients, and wastes that need to move around the body. There are three kinds of blood vessels: arteries, veins, and capillaries.
arteries carry blood from heart ,veins carry blood back to the heart and capillaries connect these blood vessels
(note: pulmonary artery and vein are exceptions)
5)The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide. The primary organs of the respiratory system are the lungs, which carry out this exchange of gases as we breathe.
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Answer:5 sense organs
Eye : enables us to see
Ear : enables us to hear
Nose: enables us to smell
Skin: enables us to feel the things
Tongue:sense of taste
Explanation: