In some respects it could be loosely termed a gland, as it excretes blood, but it is most commonly referred to as a muscle, as contractions are required to pump blood out through the pulmonary artery and aorta. Some people also call it an organ...
The pericardial sac, consisting of the parietal (outer) and visceral (inner) layers surrounds the heart. This contains a small amout of fluid to lubricate and cushion the heart as it expands and contracts, but it is not necessarily a gland.
thyroid
Both the thyroid and adrenals produce hormones that affect heart rate.
Pineal Gland
Two hormones that affect heart rate are epinephrine and norepinephrine. Both are actively involved with the body's stress response system. These hormones cause the body to increase heart rate so that oxygenated blood can reach muscles faster to promote more muscle strength and endurance.
the heart WRONG! its the pituitary gland, its in your brain,and the hearts not a gland.
the heart WRONG! its the pituitary gland, its in your brain,and the hearts not a gland.
Thymus Gland
The thymus gland is in the upper thorax anterior to the heart.
thymus gland
It is the thymus gland.
thymus
The heart, lungs.
The pericardial sac, consisting of the parietal (outer) and visceral (inner) layers surrounds the heart. This contains a small amout of fluid to lubricate and cushion the heart as it expands and contracts, but it is not necessarily a gland.
Heart lies in mediastinum. The wall of mediastinum and phrenic nerve lies between the heart and lungs. Phrenic nerve supply to the diaphragm.
Yes, a horse does have a thymus gland. It is also known as the sweet-bread and is located cranial to the heart.
Structures in the thoracic cavity are thymus, thyroid gland, larynx, trachea, bronchial tubes, lungs, heart. Organs: Heart, lungs, thyroid gland.