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Lady bird [3.3K]
4 years ago
5

Explain why flatworms do not need a respiratory or circulatory system

Biology
1 answer:
zysi [14]4 years ago
8 0
Because Oxygen and CO2 are transported into and out of individual cells by simple diffusion.
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when measuring the blood pressure, the cuff is deflated until two consecutive beats are heard through the stethoscope. This meas
dem82 [27]

Answer: Systolic pressure.

Explanation:

Every time the heart beats, it pumps blood into the arteries, which are vessels through which blood circulates from your heart to your tissues with the oxygen and nutrients they need. Blood pressure is the force of the blood pushing against the walls of the arteries, and is highest when the heart beats, pumping blood, which is measured as systolic pressure (i.e., when the heart contracts). On the other hand, diastolic blood pressure refers to the pressure of blood in the artery when the heart relaxes between beats (i.e., when the heart relaxes). Since there are two types of pressures, blood pressure readings are given in two numbers, with the top number being the systolic pressure and the bottom number being the diastolic pressure.  

For example, if the systolic pressure measured in a person is 125 millimeters of mercury (mm Hg) and the diastolic pressure is 85 mm Hg, the blood pressure is recorded as 125/85.  

So, <u>the systolic blood pressure is registered with the stethoscope when the cuff is deflated.</u> When two heartbeats are heard, the pressure gauge reading is recorded. <u>When the heartbeat ceases, the cuff pressure is released and the diastolic pressure is measured at this time.</u>

4 0
3 years ago
Adding an extra nucleotide to a dna sequence produces what type of mutation answers
timama [110]
The addition of an extra nucleotide to a DNA sequence produces a mutation that is called insertion. An insertion mutation can be in various sizes, from one nucleotide base pair to a section of one chromosome inserted into another. When one or more nucleotides are inserted into the genome, the processes of translation and transcription could be disrupted, resulting in altered protein synthesis. 
4 0
4 years ago
Read 2 more answers
The main source of carbohydrates is meat, fish, cheese, and peas. <br> a. True<br> b. False
Sergio039 [100]
Its False because the main source of carbohydrates is bread and rice so the answer is b.False :))
i hope this be helpful
6 0
4 years ago
What did Charles Darwin learn from reading the work of Charles Lyell? O Earth is relatively young. All geological change is caus
AnnyKZ [126]
Earth is relatively young
6 0
3 years ago
Write a short paragraph (3- -4 sentences) to compare TWO different locations in the world. You should focus on the type of preci
expeople1 [14]

Answer:

i would write about a well economically developed country like " USA, China, Japan or Germany" Vs a badly developed country like "Fiji , Peru , South Africa" its easy to research these places :)

Explanation:

good luck champ

5 0
3 years ago
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