Chambers of heart, Biology

Assignment Help:

The ventricles are separated from each other by the interventricular septum and the atria are separated from each other by the interatrial septum. The interior of the right atrium has a rough anterior part, the atrium proper and a smooth part called the sinus venarum. Also it has an appendage called the auricle. All the large veins open into the smooth part. The opening of the superior vena cava is situated in its upper and posterior part and that of inferior vena cava into its lower part, close to the interatrial septum. The opening of the inferior vena cava is bounded by a fold called the valve of the inferior vena cava. Just to the left of this is the opening of the coronary sinus. Besides these there are small openings called venae cordis minimae for small veins of the heart.

1087_CHAMBERS OF HEART.png

The sinus venarum and the atrium proper meet at a muscular ridge called the  crista terminalis which corresponds to a groove externally called the  sulcus terminalis.

Musculi pectinati are the ridges found in the atrium proper. The interatrial septum shows an oval depression called the  fossa ovalis in its lower part, the upper margin of which forms a curved ridge called the  limbus fossa ovalis. The wall of the fossa ovalis is thin and represents the embryonic septum primum. The limbus fossa ovalis represents the lower curved edge of the septum secundum.  The right atrium opens into the right ventricle through the right atrioventricular orifice, which is guarded by the tricuspid valve.


Related Discussions:- Chambers of heart

Relate osseointegration with biointegration, Osseointegration Vs. Biointegr...

Osseointegration Vs. Biointegration In 1985, dePutter observed that there are two ways of implant anchorage or retention: mechanical and bioactive. Mechanical retention refers

Why do organisms live in certain places, Why do organisms live in certain p...

Why do organisms live in certain places? Think of that, the temperature dissimilarity in the desert is huge. So in order to survive, the cactus plant decreases heat gain and he

Locomotion in annelida, Locomotion in Annelida Before we discuss the ...

Locomotion in Annelida Before we discuss the details of locomotion in annelids, we have to recapitulate the major subdivisions of the phylum Annelida. Phylum Annelida contain

What concentration of sucrose solution should administered, The volume of M...

The volume of Mrs. X's plasma was 3 liters before Ed administered the IV. Assume that there was a complete mixing of the administered water with her plasma but no mixing with her i

What are the main events of the final mitotic period, What are the main eve...

What are the main events of the final mitotic period? The final mitotic phase is telophase. In telophase the following events happens: decondensation of chromosomes, every set

Structure of spermatozoan, STRUCTUR E OF SPERMATOZOAN Structure of spe...

STRUCTUR E OF SPERMATOZOAN Structure of sperm is divided into 3 parts -      (1) Head                  (2) Middle piece             (3) Tail 1 .       HEAD

Aquatic and terrestrial plant, what is common between aquatic and terrestri...

what is common between aquatic and terrestrial plants

Sex-limited traits, can u show the different activities on the topic

can u show the different activities on the topic

Causes of extinction, CAUSES OF EXTINCTION - 1 .       HUNTING - ...

CAUSES OF EXTINCTION - 1 .       HUNTING - Man started hunting wild animlas for food and safety trade and fun. It may be subsistence hunting, commercial hunting and sp

Types of drug action, TYPES OF DRUG ACTION - 1 .       PHARMACODYNAMI...

TYPES OF DRUG ACTION - 1 .       PHARMACODYNAMIC DRUGS - These drugs modify the physiological and biochemical processes in the patient's body to eliminate the disease.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd