Answer:
it affects the hardness of the shells because calcium has a high reactivity which causes the shell to be hard
Explanation:
Answer:
The nervous system, the integumentary system, the muscular system (and the skeletal system) are all involved in responding to a sharp object.
Explanation:
The eye convergence effect allows you to see only one image of nearby objects. Mydriasis is the dilation of the pupil when you reduce light or see into the distance.
<h3>Describe the structure of the human eye.</h3>
Each eye constantly adjusts the amount of light it receives, focusing on both near and far objects, producing a continuous image that is instantly transmitted to the brain. The orbit is a cavity of bone that contains the eyeball, muscles, nerves, blood vessels, and structures that produce and drain tears. The eyeball is made up of three layers, including the optically transparent aqueous humor, the lens, and the vitreous.
- The outermost layer consists of the cornea and sclera.
- The middle layer contains the main blood supply of the eye.
- The inner layer consists from back to front of the choroid, ciliary body and iris.
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Answer:
1. Iron (ferrous)
2. Zinc
Explanation:
Iron is a major component of hemoglobin which is responsible for the transportation of oxygen from lungs to all cells of the body, while excess iron has also negative effects on our body such as it causes liver disease (cirrhosis, cancer), heart attack, diabetes and sometimes it causes death. Zinc also plays a vital role in our body because it is a main component of all cells and also provide protection against microbes. It also needed for the production of DNA and protein. Zinc in excess amount causes copper deficiency, Nausea Stomach Pain and Diarrhea.
