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The heart is an organ that pumps blood via the circulatory system to the rest of the body. The heart is a marvelously crafted muscular pump and in humans, the heart of an embryo begins beating 21 days after conception. According to the Bible the heart is the seat of our deepest emotions and wishes.
Heart is situated inside the thorax in vertebrates and in human body is slightly to the left. Human heart consists of 4 main chambers, 2 atria and 2 ventricles. The right side of the heart receives blood from the body and pumps it to the lungs where it is oxygenated and returns to the left side of the heart. The left side of the heart pumps the oxygen carrying blood to the rest of the body.
References to the Heart in the Bible
Genesis 6:5 The LORD saw how great man's wickedness on the earth had become, and that every inclination of the thoughts of his heart was only evil all the time.
Genesis 8:21 The LORD smelled the pleasing aroma and said in his heart: "Never again will I curse the ground because of man, even though every inclination of his heart is evil from childhood. And never again will I destroy all living creatures, as I have done.
Exodus 4:21 The LORD said to Moses, "When you return to Egypt, see that you perform before Pharaoh all the wonders I have given you the power to do. But I will harden his heart so that he will not let the people go.
Exodus 7:3 But I will harden Pharaoh's heart, and though I multiply my miraculous signs and wonders in Egypt,
Exodus 13 Yet Pharaoh's heart became hard and he would not listen to them, just as the LORD had said.
Exodus 22 But the Egyptian magicians did the same things by their secret arts, and Pharaoh's heart became hard; he would not listen to Moses and Aaron, just as the LORD had said.
Exodus 32 But this time also Pharaoh hardened his heart and would not let the people go.
Exodus 34 When Pharaoh saw that the rain and hail and thunder had stopped, he sinned again: He and his officials hardened their hearts.
Exodus 35 So Pharaoh's heart was hard and he would not let the Israelites go, just as the LORD had said through Moses.
Deuteronomy 2:30 But Sihon king of Heshbon refused to let us pass through. For the LORD your God had made his spirit stubborn and his heart obstinate in order to give him into your hands, as he has now done.
Deuteronomy 5:29 Oh, that their hearts would be inclined to fear me and keep all my commands always, so that it might go well with them and their children forever!
Deuteronomy 6:5 Love the LORD your God with all your heart and with all your soul and with all your strength.
Deuteronomy 6 These commandments that I give you today are to be upon your hearts.
Deuteronomy 10:12 And now, O Israel, what does the LORD your God ask of you but to fear the LORD your God, to walk in all his ways, to love him, to serve the LORD your God with all your heart and with all your soul,
Deuteronomy 11:13 So if you faithfully obey the commands I am giving you today--to love the LORD your God and to serve him with all your heart and with all your soul--
Deuteronomy 26:16 The LORD your God commands you this day to follow these decrees and laws; carefully observe them with all your heart and with all your soul.
Deuteronomy 29:18 Make sure there is no man or woman, clan or tribe among you today whose heart turns away from the LORD our God to go and worship the gods of those nations; make sure there is no root among you that produces such bitter poison.
Deuteronomy 30:2 and when you and your children return to the LORD your God and obey him with all your heart and with all your soul according to everything I command you today,
Joshua 11:20 For it was the LORD himself who hardened their hearts to wage war against Israel, so that he might destroy them totally, exterminating them without mercy, as the LORD had commanded Moses.
1saiah 1:13 Hannah was praying in her heart, and her lips were moving but her voice was not heard. Eli thought she was drunk
1saiah 2:1 Then Hannah prayed and said: "My heart rejoices in the LORD; in the LORD my horn is lifted high. My mouth boasts over my enemies, for I delight in your deliverance.
1saiah 6:6 Why do you harden your hearts as the Egyptians and Pharaoh did? When he treated them harshly, did they not send the Israelites out so they could go on their way?
1saiah 10:9 As Saul turned to leave Samuel, God changed Saul's heart, and all these signs were fulfilled that day.
1saiah 26 Saul also went to his home in Gibeah, accompanied by valiant men whose hearts God had touched.
1st Kings 2:4 and that the LORD may keep his promise to me: 'If your descendants watch how they live, and if they walk faithfully before me with all their heart and soul, you will never fail to have a man on the throne of Israel.
1st Kings 3:9 So give your servant a discerning heart to govern your people and to distinguish between right and wrong. For who is able to govern this great people of yours?"
1st Kings 12 I will do what you have asked. I will give you a wise and discerning heart, so that there will never have been anyone like you, nor will there ever be.
2nd Kings 22:19 Because your heart was responsive and you humbled yourself before the LORD when you heard what I have spoken against this place and its people, that they would become accursed and laid waste, and because you tore your robes and wept in my presence, I have heard you, declares the LORD.
1st Chronicles 28:9 "And you, my son Solomon, acknowledge the God of your father, and serve him with wholehearted devotion and with a willing mind, for the LORD searches every heart and understands every motive behind the thoughts. If you seek him, he will be found by you; but if you forsake him, he will reject you forever.
1st Chronicles 29:17 I know, my God, that you test the heart and are pleased with integrity. All these things have I given willingly and with honest intent. And now I have seen with joy how willingly your people who are here have given to you.
2nd Chronicles 12:14 He did evil because he had not set his heart on seeking the LORD.
2nd Chronicles 19:3 There is, however, some good in you, for you have rid the land of the Asherah poles and have set your heart on seeking God."
2nd Chronicles 30:19 who sets his heart on seeking God--the LORD, the God of his fathers- -even if he is not clean according to the rules of the sanctuary."
Ezra 27 Praise be to the LORD, the God of our fathers, who has put it into the king's heart to bring honor to the house of the LORD in Jerusalem in this way
Nehemiah 9:8 You found his heart faithful to you, and you made a covenant with him to give to his descendants the land of the Canaanites, Hittites, Amorites, Perizzites, Jebusites and Girgashites. You have kept your promise because you are righteous.
Job 23:16 God has made my heart faint; the Almighty has terrified me.
Psalms 4:4 In your anger do not sin; when you are on your beds, search your hearts and be silent. Selah
Psalms 7 You have filled my heart with greater joy than when their grain and new wine abound.
Psalms 7:9 O righteous God, who searches minds and hearts, bring to an end the violence of the wicked and make the righteous secure.
Psalms 9:1 I will praise you, O LORD, with all my heart; I will tell of all your wonders.
Psalms 22:14 I am poured out like water, and all my bones are out of joint. My heart has turned to wax; it has melted away within me.
Psalms 26 The poor will eat and be satisfied; they who seek the LORD will praise him--may your hearts live forever!
Psalms 24:4 He who has clean hands and a pure heart, who does not lift up his soul to an idol or swear by what is false.
Psalms 26:2 Test me, O LORD, and try me, examine my heart and my mind;
Psalms 27:3 Though an army besiege me, my heart will not fear; though war break out against me, even then will I be confident.
Proverbs 3:5 Trust in the LORD with all your heart and lean not on your own understanding;
Proverbs 4:23 Above all else, guard your heart, for it is the wellspring of life.
Proverbs 6:14 who plots evil with deceit in his heart--he always stirs up dissension.
Proverbs 18 a heart that devises wicked schemes, feet that are quick to rush into evil,