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Mandarinka [93]
3 years ago
6

What is the posterior opening of the digestive tract called?

Biology
2 answers:
I am Lyosha [343]3 years ago
6 0
The posterior opening is called the anus
belka [17]3 years ago
6 0
That would be yout tush. :)
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The organic molecules known as phospholipids are key components of cell membranes and composed of which molecules?
Rudik [331]
Glycerol and fatty acids are the organic molecules

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8 0
3 years ago
What is the Reynolds number for blood leaving the heart through the aorta if the diameter of the aorta is 2.15 cm and the blood
defon

Answer:

b. laminar flow

the reynold number is 1329.26

Explanation:

Re = (V x D x ρ)/ η

where,

V = mean velocity = 15.9 cm/s = 0.159m/s

D = vessel diameter = 2.15cm = 0.0215m

ρ = blood density = 1050 kg/m3 = 0.00105 kg/cm3

η = dynamic viscousity= 2.70 × 10-3 Pa·s = 2.70 × 10-3 kg/m-s

applying the formular to calculate for reynolds number, Re =

Re = (V x D x ρ)/ η

   =(0.159 x 0.0215 x 1050) / 2.70 × 10-3

   =3.589/0.0027 = 1329.26

the Reynolds number for the blood leaving the heart through the aorta if the diameter of the aorta is 2.15 cm and the blood has a dynamic viscosity of 2.70 × 10-3 Pa·s, a density of 1050 kg/m3, and travels at a mean fluid velocity of 15.9 cm/s is 1329.26

which flow through the aorta in a Laminar flow

Note that

a) turbulen= Re  >4000

b) laminar= Re  <2300

c) transitioning between laminar and turbulen= Re between 2100 and 4000

3 0
3 years ago
How do cyanobacteria photosynthesize?
svetlana [45]

Answer:

hope it helps...

Explanation:

In general, photosynthesis in cyanobacteria uses water as an electron donor and produces oxygen as a byproduct, though some may also use hydrogen sulfide a process which occurs among other photosynthetic bacteria such as the purple sulfur bacteria. Carbon dioxide is reduced to form carbohydrates via the Calvin cycle.

3 0
3 years ago
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In typical plant cell essentially visible orgenalle_______​
andrey2020 [161]

Answer:

plantcell

Explanation:

because plant cell have central vaccole choloroplasts and plastids which are essentially visible organelles

6 0
3 years ago
1. Which of the following is NOT part of the body’s first line of defense against disease?
m_a_m_a [10]

Answer:

tears

Explanation:

7 0
4 years ago
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