While the question seems a bit unclear, in reference to electricle pathways: an extra pathway in the heart is termed an "accessory" pathway.
systemic circulation
An abnormal, rapid heart rhythm, due to an extra pathway for the electrical impulses to travel from the atria to the ventricles.
With Wolff-Parkinson-White Syndrome, the heart has an extra nerve, or "accessory pathway" that electrically connects the _____ to the _____.
The coronary pathway takes blood to the heart.Related Information:Coronary arteries surround the heart and provided the muscles of the heart with blood.
another heart
Yes, heart defects can kill. A heart defect is a structural abnormality in the heart. It makes the heart inefficient. The heart has to work harder to sustain life. The heart wears out or enlarges from being overworked. It might not be enough to oxygenate the body to sustain life. Most babies are born with an Patent Ductus Arteriosus (PDA). This is an extra pathway in the heart for the fetus. Around 10 days, this PDA closes. Without this extra pathway, some defective hearts are unable to sustain life. Surgery or medicines are required to save the life. Alternately, some heart defects are benign. A Still's Murmer is a heart murmer that can only be detected when the patient is horizontal. It has no known ill effects.
A concrete pathway is a sidewalk.
hepatic portal system... ;)
A vein. Your veins take blood back to the heart to be pumped to the lungs to get oxygen. When your veins flow blood back to the heart, it goes through the left side of your heart.
Pulmonary circulation :)
circulatory system
A fetus's heart develops early (3-5 weeks after conception). It starts out as a tube and then grows into 4 chambers around 5 weeks. It starts beating around 5 weeks but usually can't be heard until 7-9 weeks. During weeks 20-24 a fetus's heart heart develops more fully. An ultrasound of the heart during this time can rule out some congenital heart defects (CHDs) just by looking at the shapes of the four chambers of the heart. (Some CHDs are not detectable by ultrasound.) Before birth, the fetus's heart pumps blood oxygenated in Mom's lungs received via the placenta. During this time, an extra pathway (PDA) exiting the baby's heart is left open. After birth, this extra pathway closes and the heart pumps blood to the baby's lungs to get oxygen in the bloodstream.