1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lorasvet [3.4K]
4 years ago
8

Why does our body need a defense system ?

Biology
1 answer:
algol [13]4 years ago
6 0

Answer:

Explanation:

You have external defense systems, which include your skin, tears, mucus, saliva, stomach acid, cilia (small hairs) and helpful bacteria. ... The skin stops pathogens from entering the blood, at least when you're not bleeding. The tears, mucus, and cilia trap them and help push them back out of your body.

pls mark as brainliest.................................

You might be interested in
What are positive effects of plastics? moldability, affordability, and durability moldability, affordability, and carbon dioxide
luda_lava [24]
Moldability, affordability and durability<span>
</span>
5 0
3 years ago
Read 2 more answers
Nemo, a marine fish (adapted for life in the sea salt water ) is placed inside a freshwater aquarium. The next day, the owner fi
pychu [463]

Answer:

The freshwater is hypotonic to the fish

Explanation:

<em>A marine fish is adapted to living in water that is salty.</em>

<em>The fish will not survive because the freshwater would be hypotonic to the body of the fish and as such, excess water would enter its body which will lead to its death. The cells that make up the body of the fish will take-in excess water and lyse, leading to the death of the fish itself.</em>

4 0
3 years ago
3. What are 6 things the ocean provides for humans?
Veseljchak [2.6K]

Answer:

What are 6 things the ocean provides for humans?

The Ocean produces more oxygen than the Amazones.

The Ocean regulates the Earth climate.

It is an important source of food.

The best holidays are close to the water.

Many jobs are related to sea activities.

The Ocean has therapeutic properties.

Explanation:

It is often thought that rainforests are the primary source of oxygen on the planet, but the truth is that rainforests are only responsible for 28% of the oxygen on earth while oceans are responsible for the 70%. It does not matter how far we live from the sea, from every ten breaths you take seven come from the ocean

In many ways, the sea regulates our climate. It soaks up the heat and transports warm water from the equator to the poles, and cold water from the poles to the tropics.

The ocean is the number one source of protein for more than a billion people. Fish accounts for about 15.7% of the animal protein consumed globally (2).  Although, not everything is fish and seafood.

The ocean is not just home to us ocean lovers, but it is home to the greatest abundance of life on our planet. When you sail across an ocean, you will see dolphins, whales or a turtle popping up to take a breath.

The ocean is a happy-zone! Our temple, our life, our second home, our exhilaration place. It’s where we swim, surf, sail, dive, chillax, and ‘lime’. Family holidays and Sundays often happen on the beach. For sailors, fisherman and islanders, it also is a transport zone.

The FAO estimates (6) on the most recent official statistics indicate that 59.6 million people in the world were engaged in fisheries and aquaculture in 2016. Only at the European Union level, the blue sector represents 3.362.510 of jobs(7), in 9 subsectors: coastal and maritime tourism, Aquaculture, Renewable Energy, Mineral Resources, Biotechnology, Fisheries, Shipbuilding and Ship repair, Offshore Oil and Gas, and Transport. In fact, 90% of the world trade is made by sea

4 0
3 years ago
The synthesis of calcitriol, a steroid hormone secreted by the kidney, is dependent on the availability of a related steroid cal
SSSSS [86.1K]

Answer:

True.

Explanation:

Vitamin D is a fat soluble vitamin that is responsible for fostering the absorption of calcium, magnesium and phosphate in the body.

The synthesis of calciferol is dependent on the availability of a related steroid called cholecalciferol (vitamin D3), which may be synthesized in the skin or absorbed from the diet because keratinocytes of the epidermis and fibroblasts of the skin is response for producing vitamin D3(calciferol) by absorbing it from ultraviolet light when during exposure to UV B photons which protolyses provitamin D3 to pre vitamin D3 in the human body.

It can also be gotten from food sources like milk, cheese, cereals, liver,meat e.t.c.

3 0
4 years ago
How organelles work together to help maintain the cells homostasis ?
Bumek [7]
The nucleus helps to regulate the functions of other organelles. Helps to regulate specialized functions and preform specific roles is the answer I believe
3 0
3 years ago
Other questions:
  • Which statement describes a cell process that is common to both eukaryotic and prokaryotic cells
    12·1 answer
  • The brain and spinal cord are covered and protected by three connective tissue layers called __________.
    11·1 answer
  • Which of the following statements is false A. Age structure analysis reveals that the population of the United States is growing
    8·2 answers
  • 1. Which of the following was Rudolf Virchow's contribution to our understanding of cells?
    6·2 answers
  • Stomata help plants
    11·2 answers
  • Which factors could be potential sources in the experiment
    10·1 answer
  • Name 5 ways that organism can be preserved as fossil and explain what fossil can show about earth history
    13·1 answer
  • Asap help me, will give brainly
    12·2 answers
  • The ________ are the primary organs for filtration of the blood.
    14·1 answer
  • which the following describes a recognition process most closely analogous to adaptive, as opposed to innate , immune recognitio
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!