Which organ systems help deliver oxygen to body cells

Answers

Answer 1
Answer: Respiratory and the circulatory.
The respiratory system allows gas exchange to occur at the lungs, swapping CO2 for O2.
This O2 is then picked up by the blood travelling through the circulatory system, allowing it to be delivered to the cells.
Answer 2
Answer:

Final answer:

The respiratory and circulatory system work together to deliver oxygen to body cells.

Explanation:

The respiratory and circulatory systems work together to deliver oxygen to body cells. The respiratory system is responsible for breathing in oxygen and expelling carbon dioxide, while the circulatory system transports oxygen-rich blood to the cells. Within the circulatory system, the heart pumps oxygenated blood through arteries to the body's tissues, where oxygen is delivered to the cells through capillaries.

Learn more about Oxygen delivery in the human body here:

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Feathers are modified ______.
a. scales
c. lipids
b. hair
d. tibia

Answers

Feathers are modified as scales. According to the history, birds which have feathers are the descendants of the dinosaurs which have scales.
That's why feathers are categorized as scales in the present record according to studies. 

Which event is likely to trigger succession?

Answers

A forest fire would trigger secondary succession

Most insects have small holes in the exoskeleton called _____, which open and close to regulate air flow. bronchi alveoli spiracles trachea

Answers

[] Question #7 


Most insects have small holes in the exoskeleton called _____, which open and close to regulate air flow. 
bronchi 
alveoli 
>> spiracles 
trachea 
the answer to your question is spiracles

How does the cell wall protect a plant cell?

Answers

cell walls are made of cellulose are only found around plant cells and a few other organisms. cellulose is a specialized sugar that is classified as a structural carbohydrate and not used for energy. if a plant cell is like a water balloon, the cell wall is like a cardboard box that protects the balloon.

How many toes does a frog have

Answers


front has 4 toes and the back has 5 toes


20 toes frogs normally have 7 toes on there fore limbs and 3 on their hind limbs

In an observational study researchers try not toA. Photograph any of the subjects
B. Include people who are difficult to contact
C. Ask questions that are too obvious
D. Influence the people in the study

Answers

Answer:

D

Explanation: