<span>Endocrine glands release chemical substances directly into the bloodstream or tissues of the body.The chemical substances released by the endocrine glands are known as hormones.
Exocrine glands release chemical substances through ducts to outside the body or onto another surface within the body.</span>
Answer: Option A.
first degree heart block
Explanation:
First degree atrioventricular block is a condition that is associated with electrical condition system of the heart in which the electrical impulses is conducted from the cardiac atria to the ventricles via atrioventricular node in a slow manner compare to the normal transmission.
It is first degree great block because it is characterized by prolong PR interval on an electrocardiogram (ECG) to more than 200 msec and atrial impulse is transfered to the ventricles, which lead to regular ventricular rate.
The PR interval of the surface ECG is measured from the start of atrial depolarization (P wave) to the commensement of ventricular depolarization or QRS complex.
large leaves because the larger the leaves are the easier it is for the plant to take in sunlight. plants need sunlight to perform photosynthesis. photosynthesis is when a plant takes in sunlight and turns it into food for itself. plants are considered autotrophs because they can make their own food. hope I helped!:)
<span>The supertree would just be a tree of all mammals. The cyn. would be at the very base of the tree, one of the first branches. (though this is poor phylogenetic theory since you cannot have extinct species in a tree)</span>
