Accumulation of blood in the veins of legs over a long period of time, as may occur in people with occupation that require standing still for long hours can lead to stretching of veins to a point where venous valves no longer are efficient. Even the leg muscles (especially Soleus)

Origin of heartbeat - SAN (Sino-atrial Node)/Pacemaker

Conduction Pathway -

SAN (Sino-atrial Node)/Pacemaker ---> AVN (Atrio-ventricular Node)/Pacesetter ---> AV bundle (Atro-ventricular bundle) ---> Bundle of His ---> Purkinje Fibres

Remember that although all the heart muscles have the ability to generate impulses that trigger cardiac contractions, the SAN initiates it,

These terms are related to respiration.

Anoxia - total absence of oxygen in inspired gases, arterial blood or tissues

Hypoxia - condition of oxygen shortage in the tissues

Hypercapnia - increase in carbon-dioxide content of blood

Asphyxia - combination of hypoxia and hypercapnia

Fetal Hemoglobin (HbF) has higher affnity towards oxygen as compared to Adult Hemoglobin (HbA) as HbF binds less strongly to BPG (Bis-phosphoglycerate) (BPG reduces oxygen affinity). Hence HbF can carry upto 30 percent more oxygen as compared to HbA. Therefore, oxygen-hemoglobin dissociation curve for HbF will appear on left side.

Hey.

There are a plenty of options that you have after class 12th of you've completed it in Medical stream. 

Here are a few courses that you go for-

MBBS

BDS

BAMS

BHMS

BUMS

BVSC

Nursing

Physiotherapy 

Radiology 

Bsc in various streams like Chemistry, Physics, Biology, Zoology, Forestry etc

Paramedical

Hello Faraz

Since you have received 45 marks in chemistry, 65 in physics and 70 marks in biology,which total makes of 180 Mark's.

I would like to tell you that yes you are eligible to apply for NEET Examination.

And for the further details, if you have any query you

Hey Harsh.

See the marks u have scored adds up to 189 in PCB group and the percentage in that results to 63%.

The cut off for the boards for appearing for NEET is 50% for general and 45% for SC/ ST so u are eligible for giving the exam.