Answer:
d. The dermis releases oils that cover the skin, and the hypodermis releases heat from capillaries.
Explanation:
The skin, the largest organ of the human body, has an essential protective function against pathogens, such as bacteria. This organ is composed of three layers of tissue: the<em> epidermis, dermis </em>and<em> hypodermis.</em>
The dermal layer or dermis has a variety of characteristics that help achieve this purpose, for example:
- <u>The presence of oil or sebaceous glands</u>: These glands produce sebum to protect the skin from pathogens and pollutants.
- The presence of sweat glands.
- The presence of hair follicles.
- The presence of blood vessels.
The hypodermis is characterized by being the deepest layer of the skin but it also protects us from infections.
- It is composed of fatty tissue, which provides an insulating layer to protect us from extreme weather.
- This fat also protect us from severe injuries due to its thickness.
- The<u> blood vessels located in the hypodermis cause the capillaries to expand and release more heat. </u>
Answer:
Volume of lead is 13.3cm3
Explanation:
Density is mass of a substance divided by volume.
The density of lead = mass÷ volume.
Mass is 150 grams.
Density is 11.3g/cm
11.3=150/volume.
Volume=150/11.3
Volume=13.3cm3.
Answer:
B. removes suspended particles.
Explanation:
The first step in water treatment involves the removal of of suspended particles through the process of coagulation, sedimentation and filtration.
Coagulation process involves the addition of positively charged chemicals to the water. The positively charged chemicals neutralizes the negatively charged particles suspended in the water to form larger particles known as flocs.
The particles are then allowed to settle down through the process of sedimentation after which they are then filtered off in a process known as filtration.
Its prophase one or prophase 2