The normal heart rate is 60-80 beats per minute and is controlled by the autonomic nervous system

The septum is a vertical wall that prevents the mixing of oxygenated and deoxygenated blood

The vagus nerve is a sympathetic nerve that accelerates the heart

The heart is located in the center of the thorax, directly behind the

The heart is a single muscle, and its contraction spreads over the heart like a

The force that blood exerts on the walls of blood vessels is known as

Nutrients from the small intestine are transported directly to the liver via:

The heart is a hollow, muscular organ about the size of a fist

The pericardium is a sac that secretes fluid to reduce friction during pumping

The first heart sound (lub) is caused by the closing of the A-V valves

Blood flow is reduced to the brain and kidneys when the body is cold

The systemic circulation starts at the left ventricle and ends at the right atrium

Which part of the systemic circulation supplies the heart itself with blood

Secondary circulation in arteries helps to reduce the load on the heart

The labels of the following figure are: A Pistil: (A1 stigma) (A2 style) (A3 ovary) (A4 ovule) / B Androecium: (B1 anther) (B2 filament) / C. The calyx / D. The corolla / E. Receptacle

is the stalk of a single flower in a cluster (inflorescence)

Embryo: it consists of: A...: the immature shoot / B...: the immature root / C...: the transition region... / D...: the first leaf/leaves

The…….. plant which produces flowers and fruits only once in life. / ......: When male and female flowers are present on separate plant

: Hilum

...: Androecium or gynoecium any one of them are present. / .....: Flower with one of the four whorl missing. / .....: group, the florets start blooming from the bottom... to the top

After entry into the embryo sac, the pollen tube tip bursts and discharges the 2 sperm nuclei. The egg nucleus + one sperm nucleus to form a 2n zygote. The other sperm nucleus + the 2 polar nuclei to