BOTANY

Detailed explanation-1: -When hibernating, an animal’s metabolism slows significantly: its heartbeat slows, it breathes more slowly (some animals even stop breathing for periods of over an hour) and its body temperature drops-in some extreme cases to below the freezing point of water (zero degrees Celsius).

Detailed explanation-2: -They experience a drop in heart rate from 40-50 beats per minute during the summer to 8-19 beats per minute during hibernation.

Detailed explanation-3: -In deep hibernation the heart rate is greatly slowed to values as low as 2.2 beats per minute but stabilizes at body temperatures somewhat above ambient temperatures, on an average 2.1° C.

Detailed explanation-4: -During hibernation, these animals aren’t sleeping. Instead, their heart rate, body temperature and breathing rate slow way down. This helps them conserve energy, which means they can stay inside instead of going out in the cold to look for food.

Detailed explanation-5: -When hibernating, marmots can reduce their heart rate to 3–4 beats per minute and will take 2–3 breathes a minute.