P wave is the atria “firing”/depolarizing, the QRS complex is the ventricles depolarizing (and the atria are depolarizing while this happens), and the T wave is the ventricles depolarizing. Depolarizing is when it contracts, and repolarizing is when it relaxes and refills.
Braxton Hicks contractions.
Braxton Hicks contractions are a tightening in your abdomen that comes and goes. They are contractions of your uterus in preparation for giving birth. They tone the muscles in your uterus and may also help prepare the cervix for birth.
Braxton Hicks contractions feel like muscles tightening across your belly, and if you put your hands on your belly when the contractions happen, you can probably feel your uterus becoming hard.
The contractions come irregularly and usually last for about 30 seconds. While they can be uncomfortable, they usually aren’t painful.
If the pain or discomfort of your contractions eases off, they’re probably Braxton Hicks contractions.
To know more about Braxton hicks :
brainly.com/question/29050753.
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Answer:
The correct answer is option C. hepatic portal system.
Explanation:
The hepatic portal system involves hepatic portal veins and its accessory tributaries. The hepatic portal system collects blood from digestive organs and spleens that consist of nutrients absorbed from these organs and circulate to the liver.
This system is unique to circulate both oxygenated and deoxygenated blood. This system involves most of the digestive organs from the esophagus to the end of the canal.
Thus, the correct answer is option c. the hepatic portal circulation.
